well done on taking the leap
as daz says fruit takes about 3 seconds to steep mix it shake it vape it.
custard imo takes a good 6-8 weeks before i even try it. bit of a pita if your trying new custard recipes especially if they turn out shite.
as said when just starting mix simple one concentrate juices of flavours you know you like untill you feel confident enough that you like the flavours youve produced but want to jazz em up a little /mix together.
you will soon find your feet and wonder what all the fuss was about.
i mix testers of 10ml some folk do 5ml or even 2ml. you dont have to add the nic untill you are sure you like the juice.
if you mix a juice that tastes awful dont always throw it away it may come good and youve missed what could have been an epic vape. i have had juice that was absolutely terrible and forgot about it in the juice cupboard only to find it a month down the line and its fantastic.
and of course if you find that million pound juice dont be scared to share the recipe with me lol.
good luck