Blowjob tips

Guys today , the new guy im seeing asked for a blow job . I'm a virgin and I've only ever given one to the last guy I was with and it was terrible . I mean he came and all but like I know I was on that weak shit . This time with the new guy I'm seeing I want to take things slow first before the big day (sex lmao) I really want to leave him satisfied . Any tips lol