My personal favorite thus far is Velvet Cloud Vapors. They are not cheap, but the vapor is incomparable. Rich, velvety clouds with heavy flavor. They have sample packs, I strongly suggest you try their Mewlew's Magic Blend and Nightshift. I just started
vaping a few weeks ago, and have tried juices from many of the most popular high-end vendors. I am gradually settling into a main supply from VCV plus a few individual juices from other vendors.
Also make sure you try a single juice flavor in multiple blends - try low/no nicotine as well as high, and mixes of base VG/PG. This way, you can figure out your preferences without the different flavors biasing your choice.
I quickly discovered that I max out at 12mg nicotine, anything greater is too harsh for me (and I was an occasional analog user, but preferred Marlboro Reds and filterless), and generally settle at 6mg nicotine. I also discovered that I generally hate PG, my body reacts to it, so I am sticking with 100% VG.
Your gear should be fine. Sure, there is better gear, and you can look at that later, but there's plenty of people ut there with thousands of dollars of high-end devices and accessories who also use simple devices like yours for some of their
vaping. Find the juices you like, crappy gear will taste good, good gear will taste great.