But he says lessons learned from the seniors in the working week have also been a highlight from a landmark campaign.
The winger from London scored twice for the under-21s recently as they enjoyed a 5-0 win over Everton.
He has learned to enjoy life on either flank and got on briefly alongside his midfield contemporary Joe Knight late in the 3-0 Prem win over Leeds at the Amex.
And he has revealed what it is like being one of several youngsters called across to train with the seniors.
Oriola told The Argus: “The first time I went over, I was probably nervous but you adapt to it.
“The first team are all nice people, they bring you into the group, and obviously having your (under-21s) team-mates coming with you helps a lot.
“I learned a lot from it and then, coming back down to the 21s, it's trying to just implement that and I feel like I'm developing and improving every day.
“Mentality is a big thing, a lot of hard work. Not dwelling on the past and just having the momentum to keep on going.
“And just trying to have that personality, if the team needs someone or if the team needs something, trying to step up.
“That being a leader as well.”
Working with the seniors meant learning the hard way, going up against defenders such as Joel Veltman and Ferdi Kadioglu in game-type situations.
He said: “It just feels like it's a good full-back to go up against, professional, so it's a good test for me.
“I like the challenge whoever I go against in training, which again helps me develop and improve.
“Veltman, Ferdi. Going up against them, they are aggressive and they are smart because they played the game at the highest level.
“That just allows me to develop and say I could do this better or now I'm going to do this
“It was a surreal feeling to make my debut. I was ready. I thought it was going to happen and then you don't really think of it at the moment.
“But, yes, great feeling. Big thanks to everyone that he's really got me there, I couldn’t have done it without them.
“Hopefully many more first-team experiences to come.”
A Diego Gomez double set the stage for Oriola and Knight to get on that day.
Oriola said: “I was told to be ready, that there was a slight chance.
“And then, when it’s 3-0, it’s like, ‘Good, it’s going to happen now’. And it happened.
“We had Leeds away the next day (in the under-21s). In that surreal moment and then straight back to reality, straight back to working.
“But obviously with the buzz and on the high against Leeds. I was just like, ‘Yeah, let's try and win this game and try to play with confidence and do what I do’.”
Oriola, now 18, had three years in the Manchester United academy from the age of 13.
He said: “It's two different styles of how they play.
“At United, their system, I think is more individual. And I was there at a younger age so I wasn’t as advanced.
“But the way they play is more attacking, it's more threats, more individualised to the player's skills and ability.
“They have a good system and they use it well, especially us playing against their 21s, we saw how they play. A good style of play.
“But I feel like Brighton is more suited for me.
“There’s more variety in Brighton's play. And obviously, when the play happens, it looks beautiful.
“For example, our first goal (against Everton).
“And I feel like the passages of play just help me as a player get on the ball and allow me to express myself fully.”
And that expression these days come from either flank.
Having initially preferred life on the right, he said: “Playing off the left and off the right has helped my game a lot and now I don't mind.
“At times, you will see me switch from left wing to right wing during the game.
“But I like both sides as much now.”
Under-21s head coach Shannon Ruth is delighted with Oriola’s development in terms of end product.
Ruth said: “He has gone from being an exciting young wide player to now being a really effective wide player.
“He is our top goalscorer and top of the assists.
“What we've seen probably in the last three to four months is someone that is bringing real impact to the game and end product.
“He has worked really hard on that, knowing when to dribble, when to pass.
“What position take up in the box when the ball was with the opposite winger.
“You saw when Solly (March, opposite winger) had the ball, he's at the back post ready to impact with goals as well as assists.
“I think sometimes wide players only think about assists whereas for us and, obviously, for Fabian we like our wingers to get in on the act with goals.
“Miah has shown real development in that area. Not only is he exciting on the eye, not only can he dribble effectively and play on either wing, he's now adding goals and assists to his game quite regularly.”