Movac have a branch in Reading, maybe worth a try -I can give you our Movac reps details, he isnt in your area but would be able to pass on your local one.
I use their 1k water based paint sayerlack which is very good.
I would recommend trying water based or pre-cat laquers as a start.
Buy some measuring containers so that when thining material, you can get repeatable viscosity and just adjust for ambient temperature.
Be very methodical, keep notes of your setup otherwise you wont know what went right or wrong and you will struggle to analyse problems or repeat good setups.
To spray an item well you need suitable support, either a turntable for flat stuff or hooks for vertical.
Home spraying without a full spraybooth needs a spray setup for minimum overspray, so turbines or hvlp spraygun are worth considering.
Spray tip around 1.4 or 1.6 for furniture paints
Most paints need thinning, if very little comes out of thr gun, or the coat is orange peel, its too thick.
If you get the tip size correct and paint viscocity right, you are getting close to a good coat. If those are not right no amount of fiddling with the gun controls will get a good film.
Start by buying a 5 litre of paint and practice doing lots of sprayouts. I find melamine faced board is very good, the smooth surface shows clearly the spray pattern and quality of film. A roll of lining paper is an option.
Furniture like chairs or awkward shapes need quite advanced spraying routines, the skill is to avoid double and triple coats in some areas but at the same time being quick enough to keep a wet edge and avoid overspray landing on drying areas.