Hi!
Welcome and congrats! Personally, I think the boge cartomizers would give you a good start! You can get a box of 5 here for $5.99 with free shipping:
Boge 510 LR (1 Box) - Stainless
Other vendors carry them as well. This one has good prices on larger quantities also. You will also want to get some juices and probably a drip tip to use on the top instead of the plastic top that comes with them. You can find those for a few dollars and they will last practically forever! I use the condom fill method (do a youtube search). That will fill them up completely. When they start to seem a bit dry, I drip 4 or 5 drops on the top of the filler material, avoiding the center hole. The liquid will soak in and refill it. I think this simulates smoking more than a clearomizer or any other advanced devices as it seems more like taking a drag on a filter.
An ego battery is also good. If you don't mind a larger size, I would go with a twist and also the highest mah (milli amp hours). All that means is more battery power and less time between charges. I am not sure if you can use your blu charger on it or not as I am not familiar with blu! The benefit of the twist is that you just twist the bottom of the battery and it gets "stronger" or "weaker". That gives you more control over the end result. You can dial it to where you like it. That may also change with different juices. You will get different results and can even burn the filler material if you turn it up too high or let the cartomizer get too dry. I find that when the cartomizer gets older, it can get weaker and clogged, so turning it up will let you get a bit more use out of them.
As you go along, you may decide to try different things. A cartomizer tank will feed the juice into the cartomizer so that you won't have to drip more liquid on the top. And, there are also many other "goodies" to buy and try. But, I think the cartomizers are the cheapest and easiest to use. Some people will even clean them to make them last a really long time! Unfortunately, you can not really try a lot of different juices in them. Once you fill them up with one juice, you are stuck with that juice in that carto. Sometimes, you can put in a stronger juice and have it take over. For example, I had some cake batter juice that I liked. After a while, I decided it was a bit bland. So, I added a little cinnamon bun to the top. After that, I could only taste cinnamon bun, even though I kept adding in more cake batter.
By going this route, you open yourself up to a whole world of new flavors! There are thousands of them to choose from! It can be a lot of fun trying out different juices! Most of all, have fun! You can make it as complicated or as simple as you want! Most things are cheap enough to try out. I watch a lot of youtube reviews. You can actually watch someone do whatever it is in "person." I find it much easier that way, to actually see it being done!