Hi NavyJoe,
I've also recently returned to the wonderful world of modelling after a few decades away, and my advice mirrors what's mentioned above in terms of picking up new tips and techniques.
I spent several happy hours checking tips on YouTube and then got myself an airbrush to experiment with. Weathering techniques and things like panel line enhancers are great fun to work on trying. Magnifier visor and filler options have upped my game big style, as well as using sprue leftovers to modify with a lighter/heat for fine detail and modifications is also great to try out. Latex mask and fine strips of masking tape make canopy lines a breeze too (although not much call for that with WW2 era aircraft).
Any other questions just let us know, the lovely guys here have helped me immensely.
Happy modelling!
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