If you're new to bouldering, as I am, and find it a bit of a stretch, just hang in there. While it may feel like an uphill struggle, dust yourself off, get a grip and rise to the occasion. It's the sort of hobby where you can reach new heights of personal fitness without having to put yourself out on a limb. One small pinch of advice though; a good pair of climbing shoes can really give you a leg up, despite the steep cost. That being said, I'd chalk prices up to rising costs all over this niche pastime.
Puns aside; the best piece of advice that I could give, which I hadn't received myself, is no matter how much you enjoy it and how good you feel over the following day or two, don’t head back right away. Bouldering is an remarkably taxing experience and if you go too frequently, you may well walk away from one session feeling like your arms have been replaced by wet bundles of noodles.