Options are a small hobby/paint compressor to run indoors or a larger one for the garage, and pipe it to where you are painting.
You can get a really decent large compressor for ~£100 which with a local regulator and moisture filter you can get full control at your painting station and silence when the compressor is running, as its out the way.
I run an Iwata studio jet pro twin compressor now as I came by a cheap used one, but I started with a 50litre compressor that I keep in the garage and used a long air hose to get it where i needed it. The advantage of this is that i can use it to clean my cars, and pump tyres and use air tools. I prefer the external compressor tbh, as the smaller indoor compressor runs for longer and the tank fill doesn't last as long.
I'd recommend an Iwata Eclipse HP-CS for starters. It's a buy once tool and will do everything, and you will get your money back if you ever want to sell it.
Createx (from
https://www.smdesigns.co.uk/) or proline paint from Modelsport are the best paints to use.
For liquid mask get a HVLP gun, no more than £20.