How is it "mastering" skills as an adult starter?

Currently as young and someone not adult, its really swift learning new skills, mainly due to past experience in learning too, brain still under development and high neurolasticity. Currently I also am working on many things like chess, maths, computer science, poetry, languages, etc but despite these there are some others things which I may want to master as adult starter. Maybe something I got to know as adult and want to master it or something that for circumstances I don't know may happen I fail to master as adult. So my questions to anyone who has been adult starter learner who actually has worked to master till expert or slight dominant level on that thing not being satisfied with brief abilities in that.

•How difficult is it to be an adult learner?

•If you have been both adult learner and young learner, how different in difficulty and experience in what you started as young and what you started as young?

•Have you reached any level as adult learner where you feel stuck? Even though not everything has elo, but still try to give it an elo equivalent of chess to give us a slight idea what level is that

•How easy or difficult is that to find a trainer/coach who does not get loose or biased as an attempt to take advantage of the fact you are adult and that most adults get satisfied with very slight ability to do something unlike competitive spirits of young?

Damn , nice

well I am 19 years old here so I count here as a adult so let see

How difficult is it to be an adult learner? // it is not very easy, it takes more longer for me to pick up skills that are very important to have when you are playing

•Have you reached any level as adult learner where you feel stuck? Even though not everything has elo, but still try to give it an elo equivalent of chess to give us a slight idea what level is that// ironily 139 Elo at best but it was very tough to suffer such losses that could be easily pre-planned

•How easy or difficult is that to find a trainer/coach who does not get loose or biased as an attempt to take advantage of the fact you are adult and that most adults get satisfied with very slight ability to do something unlike competitive spirits of young?// it is difficult to find one at least I think so due to the many failed attempts of matching a coach to me

welp there is that and this is strictly Chess that I am talking about

Regarding "how difficult is it to be an adult learner", I'd say that after 25, the peak starts to go down and you start to face issues in learning. This also applies to physical sports where the peak conditions start to go down.

This isn't to say that you can't learn, you can learn, however you'll learn at a slower rate as compared to children, who tend to learn things at a faster rate.

"Have you reached any level as adult learner where you feel stuck? Even though not everything has elo, but still try to give it an elo equivalent of chess to give us a slight idea what level is that"

I've felt stuck sometimes, especially when trying to solve web development problems. (coding). I'd give it a 1000 elo primarily because I knew the basics, I just was confused and there were new problems.

"How easy or difficult is that to find a trainer/coach who does not get loose or biased as an attempt to take advantage of the fact you are adult and that most adults get satisfied with very slight ability to do something unlike competitive spirits of young?"

I think it'd be hard.

Yeah, it’s common to feel stuck sometimes, especially once you hit an intermediate level. For example, in chess, you might get stuck around 1400-1600 Elo if you’ve learned most of the basics, but haven't broken through the tactical or strategic walls yet. Also, as an adult, it can feel like more effort is needed, but you also have a lot more patience, strategy, and motivation. So, while it’s harder, it's usually more rewarding because you really want to improve