Weights and HELP!

The same way people prescribe a novice progression program with a barbell. Start at a moderate weight for 3 sets of 5 worksets, and then progress in weight how you see fit (depends on the jumps in weight of the DBs) with compound exercises. I generally base my lifts off of Starting Strength/Stronglifts/Greyskull LP big 4-5 lifts.

A squat. I think the best Dumbbell Squat is the Goblet Squat because it forces you to make your torso rigid if done properly.

An overhead press. What to do is in the name. Stand up with the DBs and press then overhead.

A bench press. If there isn't a bench available you could try Floor Presses (though you won't get as full of a ROM) or bringing a backpack and some padding and doing pushups that gradually become weighted.

A deadlift variation. Don't know a lot of these with DBs besides Romanian Deadlift, but you could look some up.

The last lift would depend on what you want to do. SS gives you Power Cleans and SL gives you Rows. There are variations of both for Dumbbells, so pick which you prefer and go with that. (Note: If you can do chinups, there's also that option).

You'd do an A/B routine which can look many different ways. I'll show the SS way.

A:
Goblet Squat 3x5
Overhead Press 3x5
Deadlift 1-3x5 (your discretion for number of sets)

B:
Goblet Squat 3x5
Bench Press 3x5
Power Cleans 5x3 (5 sets of 3) or rows 3x5

You could also add one more lift and make the squats and deadlifts be on opposite days such as:

A:
Goblet Squat 3x5
Overhead Press 3x5
Rows 3x5

B:
Deadlift 1-3x5
Bench Press 3x5
Power Cleans 5x3

I hope this helped a little bit.