I would suggest a harbour wall at low tide, next to a ladder. Protect the rope over the edge as needed.
All techniques can then be practiced in safety, and if you get hung up just climb the ladder.
Up/Down changeovers and rebelays, knot changes and simple self rescue techniques should all be familiar. With your basic kit practice losing / braeking a piece and having to improvise.
A few meters is all you need, once happy you can move to free hangs and or bigger drops