Great start. Take it slowly, gradually increasing the time. I agree with 1pumpedman about pulling on the tube (gently wanking with it), this will increase not only the girth but also the size of your foreskin. It becomes very addictive?
I’ve got a “beginners pump”. Thanks for tip (pun intended) and yes I’m keeping the routine, but not every day. My cock needs to recover every few days.