Good to know. The guy at the shop said every few weeks or once a month =\ but he also thought a 15 ml bottle of juice would last me a few weeks, too. I obviously vape more than I smoked.
That's funny, 15ml is a week, maybe, for me. A new vapor will go through that fast, what with the transitional chain vaping and spillage.
It's always amusing to see threads like this, when everyone rushes in to recommend their personal favorites in gear and juice to newbies (C'mon, an RDA? That's a considerable investment in gear, time, money, and experience), or how to tweak or use something. There's a lot to learn about vaping and gear, if you want to dig in, or you can find a spot you're comfortable with, and stay there. We all have our own journey.
I recommend baby steps. Keep it simple, one issue at a time, that way you won't end up with a pile of gear you don't know how to use right, and don't like.
As I take it, your issue is flavor. That's been addressed. My personal recommendation is to try some vendors who's flavors I've found to be very strong, and good - Tasty Vapors is my personal favorite, at 50/50 mix they're excellent, Halo is very, very good, I love their Kringle's Curse, which is a candy cane, and some of Heather's Heavenly Vapes are very strong and excellent. I've been exploring flavors by buying sample sized bottles, Halo, Alice in Vapeland, Heathers, most of them have 10ml bottles that are pretty cheap, aren't a big investment in cash, and will give you a good idea of the flavors, without having to buy a 30ml bottle.
Also, some flavors require a steep to improve, as you've found. Some are days, some are weeks. I'm waiting on one now that's a week and a half into it's steep, and it just changed color yesterday, and started smelling like the flavor it is (orange creamsicle). Getting started is hard, because a lot of newbies don't have collections of juice yet to fall back on if a flavor is going to take time to steep - you might want to look around the juice reviews and find some that sound good, that don't require a long steep, to get you going. I was lucky, in that I found an all day vape very early in my journey, and found a few more that I use all the time, trying new ones in between.
Also, I've found I need to brush my teeth 3 times a day now, and drink a lot of water, to keep my tastebuds clear and fresh.