I think only you can say if you're too young to punt - only you know the reasons for doing so.
Personally, right at the beginning of my 20's I had a bad experience with a partner, and that ruined what little confidence I had where sex was concerned, so I just completely shut off from it. That lasted over 10 years, and to be honest I'm still not sure I'm at the point where I could trust a partner (or have confidence in myself) in a relationship, though I know I'm a lot closer now than I have been since that event.
My punting hobby has been the catalyst of that change in me, and it has helped my confidence a great deal. Do I wish I could have afforded this earlier - no, not really. I don't think I was ready and in the right place emotionally to be able to cope with this. At the moment I'm increasing my confidence whilst not having to worry about the whole of the rest that goes along with a relationship, and that suits where I am now. This also explains the pattern of my punting; preferring to stick to a couple of girls that I feel comfortable with and can build my confidence with, rather than constantly starting from square one with somebody new with all the nerves etc. that goes along with that.