At your level, I do not think you need to study in a formal way anymore. I think you can just look for things that you might enjoy doing in English, like watching English movies and reading English books. I think you can also look for people you would enjoy talking to.
I take a lot of lessons, but almost none of them involve studying the way I studied in school, so I never get tired of it. My teachers/tutors watch interesting things with me in my target language and we talk about them. They point out to me things like colocations-- the way phrases sound more natural in my target language. I enjoy reading and movies in my target language, and just talking about these things with native speakers is much more fun than ¨studying.¨
hello Ege, Ihave several hints to give you.
1st, learning is step by step, so have practical objective: for example "being able to use may:must correctly, and celebrate every little improvement.
Work with materials you like, watch series, listen to your favourite songs carefully and then look for the lyrics.
Have simple objective : work 5 minutes a day. it isn't a lot, so days you don't want to work, you can think that it isn't big deal to work 5 min. Days you have more motivation, you will work more than 5 minutes without thinking :-)
Last but not least, write why you want to learn. It will give you some motivation.