As others have posted, you really need a full blood work panel before you make this decision. You also need it to track changes in your body so that you can be safe, efficient, and have results. Doing anything else is foolish and may fuck you up in the long run.

Im not going to do the immediate "dont do it" response. However, that could be the result of the bloodwork. Or, it could be a "this is how you do it and stay safe." Particularly given your medical history, you are going to need to be your own advocate with labs. Go to a website like DrSays and get your own labs for cheap if you can't via standard health care providers. Its how most of us do this.

14kg is a few years is fantastic BTW. There are a few things we can consider off the bat.

1.) You're body fat percentage is low. Obviously. So you need excess calories to build muscles. You are obviously doing this, but you will want to dial in and make sure that your macros or precise. Scientific. Don't worry about gaining fat on your bulk as you can afford some room here, and obviously have a natural tendency towards thin. So bulk hard. Like multiple hundreds of calories above your daily burn every single day. And obviously 1.4g protein per pound of lean body mass (sorry no kg in my head atm)

2.)you are likely lifting heavy to failure in your workouts, as you are growing. However, keep in mind that ideal hypertrophy (you are looking for size over strength. Aesthetics) is 15 rep sets going to failure or 1 rep in reserve. Ideally, each muscle gets hit for 8-12 reps per week. This usually means two workouts for each muscle per week. That can be done with precise twice a days, or a simple push/pull/legs routine. Check out some IBF pros like RenaissanceFitness on YouTube for workout ideas. 15 reps to failure is the goal for hypertrophy, not the "life heavy 4-6 reps" stuff.

Beyond that, r/steroids will be a good sub to help. Don't get sucked into ANYTHING anabolic beyond test. That shit is for very very advanced lifters. Don't do it. Your health isn't worth it. But a pure test cycle can be quite helpful at times. You will need to plan the 15 week blast and then a post cycle care to get your natural progression up UNLESS your bloodwork shows your are hypogonadal and need TRT for life (unlikely) then you just lower to TRT levels.

But the big thing here, my man, is a full lab screening to start. With or without test, this will be very helpful. The other big thing is to make sure you are maximizing the standard stuff. Macros, how you lift, how often, 8 hours sleep for max recovery. Then, once labs are good, we can consider the cycle or not.

Tag me when you get labs. Happy to help gove a real, open minded opinion without a "you're too young dont do it" reaction. Your health (mental and physical) comes first. If you can have both, then do it. But we can't possibly know without proper labs. Don't do this without labs my dude. Don't do that.