As for the dumbbells, I started with the exact same dumbbells as you. I quickly realized I needed 12s and I use them frequently. I also added 20s once I got to Meso 2. I really could have used 20s for leg work in Meso 1 (I don't have a barbell) but I have Cathe's weighted vest which helped me up my weight. I also got Cathe's 2 pound gloves which are very useful. I thought about buying the 4 pound gloves, but decided to get 2 pound wrist weights from Target instead. This allows me to up my weight by 3 pounds if needed. So, for example, if I need 21 pounds I use a 20# dumbbell + the 1# weighted gloves, if I need 22 pounds I use the same dumbbell + the 2# wrist wrists and if I need 23 pounds I use the dumbbell, weighted gloves AND wrist weights. So much I know! Personally, I found I progress kind of slow (1 MAYBE 2 pounds per week) so I really needed a system were I could gradually up my weights.