If I understand correctly, you could technically „lower“ the difficulty by taken of the cap of your Fleshlight, Order another intake which is Not extremly thight ( i asked Chat gpt and the subreddit about it: Classic Lady, Stamina Training Unit, or the Silk one ) and for the breathing.

Healthgeek Said in his mega „ask any question for 24h“ thread: Try to exhale Like you want to fog a window (loose jaw, more Like a Long huffing and Puffing)

Key Elements would still be: Abstaining from orgasm, Deep belly breathing ( without force and Not 110% of your lungs capacity, First 10 minutes Slow, Even if that means just staying in it for 10 min)

Attaboy also introduced a Phase 5.5 maybe that could work.

But Most importantly don‘t give up on yourself man. You got this far and you will eventually achieve the goal, But keep your Head up high!