Jelq questions

Second day of newbie routine

Now here is my question. Should I exert great force when squeezing at the shaft? How erect do I need to be I stayed pretty flaccid in today’s sessions like really flaccid. If looking for length gains should I at least get 50% erection?

Secondly I noticed my penis hanging a lot more today (I’m a grower go from 3 flaccid to 6.5 erect)
Is this a promising sign?

However after the jelq session to tonight it retracted a bit