Need some basic swimming info

[Cloud]

Somebody on here swims, don't they?

Since my knees seem to be fucked up, I want to try some swimming fitness. Now, I know how to swim--took a lot of swimming lessons as a kid, but haven't really done much as an adult. I plan to swim and do water strength training in my apartment pool (which is pretty small); but I can also do lap swimming at a local city-owned (bigger) pool.

I'm not interested in racing or joining a team. I am not built for speed!

Question: what do I really need to buy in terms of accessories? Are goggles and a swim cap really essential? What about fins? (or are they called flippers).

any comments on swimming for fitness would be appreciated.