You could donate stuff you really don't want to friends and family or food bank? There's a fair few people on here like
@Bubu who are into natural cleaning and could give you some tips on that.
I personally have about 10 products max, and use maybe 4 daily.
Basic bathroom cleaner
Basic floor cleaner
Antibac surface cleaner (only because I have a child, otherwise I wouldn't bother)
Bleach for the toilet
Washing up liquid
Rest are oven cleaner, stain remover, washing powder, vinegar for glass.
Most things you can clean with hot soapy water. The products are not relevant in my opinion as it's about effort! I find the more product I use, the less clean things feel. Even cloths are irrelevant, I like using old cut up muslins, they get better with every wash and are great at absorbing water. I will often pick eco products where possible and if not a basic product does the job. I'm not into strong smells so buying something because it smells nice isn't worth it for me, I just like it to do its job. I really like ecover products though. I've tried method but the smell is too overpowering and aggravated my eczema, as do air fresheners of any kind. I've stopped buying zoflora a while back as couldn't stand half the smells and realised that it was a completely unnecessary product!