Congratulations on baby no 2... Very exciting
The main thing I'd say is buy a range of different makes to begin with so you can see which make fits your buba best.
I love pocket nappies but maybe if your mobility problems mean you find poppers difficult it might be worth looking at nappies where the inserts snap in rather than stuff? Stuffing nappies can sometimes be fiddly and though poppers are hard for you if it's for the insert you often only have 2 to do and you can do this in advance and so could push against floor or something to snap into place. I find Grovia hybrids great and they have Velcro version.
Maybe look to see if you have a nappy library near you as seeing and testing out different versions would be good. I also found the 'nappy gurus' amazing when I first started (thenappygurus.com). If you contact them then whoever is closest to you can meet with you and go through loads of different types and brands.
Enjoying experimenting, you'll soon be hooked