I bought a KangerTech SUBVOD Starter Kit when I started vaping & honestly can recommend it to everyone. It's really easy to handle so great for beginners + it's really not a huge expense.
Stay away from the Koopor Mini. Why I think it is not a good piece of hardware for a beginner or seasoned user. The vape performance is okay with good battery level on this device.
If you're looking for something that's easy-to-use, but still performs well, I would recommend the Kanger Subvod Kit. I bought one for my mom, and she really likes it. Hope this helps.