Hi and Welcome!
For L1D1 do as many rounds as you can in 20 minutes. I don't use weights for the squats. The squats are best seen on this video
from crossfit. Some use weighted vests or dumbbells. When these are done with proper form, they are a challenge without the weight.
On L1D2 5 rounds with up to 3 mins rest between each - count time minus the rest you take.
On L1D3 try to beat the clock. No weight required.
If you can't do full weight, proper pullups, then bodyrows are recommended. The general rule for subbing with bodyrows is 3 bodyrows = 1 pullup.
Browse the workout log thread for interpretations of all of the above. And keep asking.