In view of my infrequent repairs and my limited knowledge of
electricity (tho I can learn), what is a recommended digital
multimeter and where to buy? I have no idea what my budget is but for
starters lets say $100 (estimate). I had a old analog one but it's
old and right now I can't find it so I'm willing to buy new.

Also, when I read one ad, it said the digital multimeter didn't need
to make contact with the diode? Not sure what this means? You
still need to have I assume 2 wires to touch the things in question,
right, so the meter can read the differences?