It sounds like jelqs are king for you. To each his own. You found a method you love, and it does indeed work both length and girth. As you continue PE time will tell how it affects you. Some people gain only one or the other from jelqing, some people gain both. Some of it depends on technique, some is just natural disposition.
Hot water is a good warm up. So is edging. A good warm up time is 5 minutes. Infra Red (IR) heat lamp is the best form of heat, and you can make your own out of an infra-red bulb and a “clamp lamp” like this one for about $10 - $15.
Don’t do any jelqs while the vein heals. It takes a couple weeks to go away on its own. It’s not that long to wait. Just massage the vein with heat during that time.
They say PE is a marathon not a sprint for a reason. A couple weeks off to let a vein heal is nothing in the big picture. But if you don’t let things heal and it becomes chronic it can require months or even longer off. I’m experiencing this right now from discoloration. I could have taken some time off and re-assessed the situation. Instead I kept going for another month, and now I’ve taken nearly 3 months off, and probably have another 3 more months off to go before I can PE again.
So my advice is “don’t even try it.”