Dwarf lemon and kumquat

BJ11 says...
Dwarf citrus will grow well in a large pot, and with enough light they can grow indoors.
Smaller pots will keep the plant smaller (but they may need re-potting and root trimming more regularly - essentially a giant bonsai). Use the absolute best soil you can afford - this may be a time where it is worth purchasing top notch mix.

BUT ... you will NOT get fruit without pollination. This is typically done by bees outdoors. You could try yourself with a Q-tip or put the plants outside when they are flowering so the bees can do their thing