I just get the loran flavoring which can be found anywhere to even walmart.
Order the Lorann small bottle dropers. Which are cheap as sin.
Findind what mix you like can take some time.
What I do is I have 48Mg Vg(Or PG)
I take that and fill half the bottle up with it. Which sets me around 24MG. To me this is the easiest way to get what you want. Just cut it in half.
Then I fill the rest up with VG but around 10-15%, and cap the rest off with PG to make it more liquidy
.
You could just use water instead of PG like 5% on VG and it will make it not so thick.
Some people don't want any VG in their liquid, and that's just fine. It will just run like water. TW I think marks on their bottles 15VG. It's a lot harder than it sounds

Making a bottle of liquid only takes secs/
Now for the dropper that you bought. I put 1 dropper full of lorann flavoring per 5Ml. So if I was making a 30Ml batch 6 droppers/ 10Ml 2 droppsers/
Sometimes I add an extra drop/
Other than that it's easy.
Rule is use very very little flavoring. It maybe is 1% of the liquid which is not very much.
and yes you just put it all in one bottle and shake it up
