Can you help me select a pot?

Umm AVs don't make a large root mass, so I figure you're considerably overpotted for a single plant. Definitely don't go bigger.

Do you suggest a self watering pot?

I don't personally like them...they're too fiddly, but lots of people do.

I believe I remember Irina saying that no AV ever needs any bigger than ? a 6 inch pot? And they're shallow rooted, so something like an azalea pot is best vs tall one.

It seems to me that you can get by with a smaller than 4" pot - may be 3 - 3.5" - especially if the bottom row of leaves is getting tired and needs to be removed. You need a decent AV soil and perlite to add to it. Azalea type - squatty pot will be perfect. You can probably find a 3.5 plastic pot in a good nursery - or you can recycle any plastic container - just punch holes - until you get the one you like so you can move it.

I agree with DBarron - double ceramic AV pots are tricky - too big, too expensive, tend to drown the roots...etc. The best self watering pot is Oyama - they have a correct size. There is an overpriced Dandy Pop that also works - though the standard size is too big for your plant.

I understand that nowadays AV clubs are shrinking because everybody hangs on internet. But it is much more productive to see how it is done, rub the soil between the fingers... to recognize the texture, humidity etc... So if you find a club in your area - check AVSA.org - local clubs - you can find experts, mentors and plant material to try.