The biggest thing I'd recommend doing is searching for a local vape shop near you. Not a smoke shop that just sells vape related gear on the side, but a legit vape shop if you can find one. You can buy everything online, and it's usually a little cheaper but I found that I was getting discouraged waiting on shipping all the time when ordering new juices, new parts, new coils, etc. When I first started I had no idea how to plan ahead because I had no idea how quickly I'd be replacing things and how long my juice would last me.
If the vape shops near you are anything like the ones around me, the guys that work there are usually very knowledgeable and can talk you through everything in person.
I see you mentioned you want an "e-cigarette available with tobacco flavor". I would suggest buying a tank+battery setup so that you can experiment with different juice flavors and find the one you like the best. You will be taste-testing different flavors and finding the ones you like the best, you can then refill the tank with any flavor you like.
A local vape shop will likely try to start you off with an Ego kit, as this seems to be the most common and a good entry level point. My only problem with these kits is that they usually come with a very poor "clearomizer" tank that attaches to the battery (this is the plastic tank that has the wick inside it to soak up the juice). I have had nothing but bad luck with constant burnt tastes and poor performance when I tried using one of these. If I were to suggest a starting point for a brand new vaper I would recommend an Ego c-twist battery with a protank 2 mini on it. This is a very basic setup with a nice glass tank. You will be able to get nice vape production and good flavor with a slim "pen style" design.
If you want something a bit bigger, with a bit more battery life, and like the box style batteries I would highly recommend looking at an iTaste MVP v2 battery with a protank 3 on it. I ran this exact setup for about 6 months and it was very good to me.
Buying cheap tanks will usually only result in burnt tastes, bad flavors, and bad perfomance. This will likely land you back into the land of cigarettes.