Hello and welcome 
There are some toys that are designed to help with this LH have a few in their store you may want to look at, the fleshlight stamina being one.
There was a thread made a short while back regarding PE Help stop premature ejaculation - #11 by Moodymopar18 you may find some tips that will help.
Edging appears to be a good exercise whilst wearing a thick condom to reduce sensation, as you begin to feel the need to orgasm stop, wait a bit then repeat the process. Doing this a couple of time on a daily basis may help you to condition yourself to be able to control the orgasm. Being mindful will help, not worrying about PE more so concentrating on what you are doing. Focusing your mind away from having an orgasm.