Check out
https://www.redber.co.uk/
I've tried several of their green cofee beans. My favourite is Ethiopian Yirgacheffe.
Roasting coffee makes a lot of smoke so I do it outside in the garden with a camping stove. You really need to blast the beans with a good heat and stir constantly to keep them moving, especially towards the end. It will only take 15mins or so. Nothing I've ever bought in a supermarket comes close.
It's really interesting to see what kind of flavours you can get with different roasts. Medium dark is usually the sweet spot for me: lots of caramelisation without killing the fresher, zesty flavours completely. Carbonised dark roasts are the work of Satan.
I used an Aeropress for a while. It makes good coffee - including espresso strength if you want it - but I find I like "cowboy coffee" better ie simply add hot water to coffee grounds and filter through a tea strainer. The fine silt which gets through the tea strainer gives it more flavour
IMO a fast extraction (and therefore a fine grind) is the secret of good coffee. More of the bitter flavours start to come out the longer you leave it to brew. That can make a super-concentrated espresso undrinkable.