Welcome Thumper, and congrats on transitioning to
vaping. I'm glad you got your device working, that's great. By the time you can afford a higher strength liquid, you may not need one... depending. I did find higher nicotine in my vape useful for those really "hard" moments. Juice can be as important as gear, so in the meantime, you might want to see if you can find a vape shop that will allow taste testing of their juices. Even if you don't buy some immediately, you may find that you have started out figuring what tastes good to your "palate." Having a few juices you like can really help that "attachment" to vaping moving forward.
I also would suggest a backup device once you can afford one, and as you save over time from quitting smoking, you will find that the startup costs are more manageable. Starting out, commercial juices can be great and easy to use. To maximize savings at some point you may want to look into DIY e-liquid, which is a whole other rabbit hole to jump down (I also mention it due to the FDA stating it may want to "regulate" they type of eliquid flavors and reducing choices as far as commercial juice.
But, that's not something to worry about now, it won't be happening overnight or anything. Once you get some preferences dialed in there are tons of great juice vendors at reasonable prices. I actually think starting out with commercial juices has a benefit, as often they are more highly flavored and sweetened than many DIY creations, but since you sense of taste and smell are going to be recovering from smoking, sometimes stronger tasting e-liquid can be useful.
Also, the myriad of options currently available is pretty stellar. But, since you have your setup working for you, you have plenty of time to research a second setup, etc. Lots of variety and styles of vaping to be explored.
Most of all welcome, and you, like many other vapers before you, can be successful! I did not believe it myself when I hit my first non-smoking day. It sounds like you are doing well, so congratulations and welcome!
Vaping can be as complicated or simple as you choose, and ECF is a great place to find your vaping wheelhouse. Welcome, and i wish you all the success in the world!
Anna