Paddling Out With a Funboard 7'0

I've been surfing for a year and I've never had a problem getting into the lineup. However, I do it in a very janky way. I often ditch my board a lot and swim underwater then pull my board back and continue paddling. This works but obviously puts others behind me in danger. I've never actually hit anyone but I have broke my leash one time and had a hard time swimming back to shore.
I really don't know what else to do, especially if I'm about to take a wave on the head. I definitely cannot duckdive this board and turtle rolling seems even more sketchy on waves that are 5ft+. Any tips? Also a side note, are there any tips for swimming back to shore after a broken leash?
I really don't know what else to do, especially if I'm about to take a wave on the head. I definitely cannot duckdive this board and turtle rolling seems even more sketchy on waves that are 5ft+. Any tips? Also a side note, are there any tips for swimming back to shore after a broken leash?