This is going to sound stupid to some.. I recently finished sololearns JavaScript course and I loved it but I want to learn more but I have no idea where to start.. I've been browsing tutorials on YouTube but it doesn't help too much.. does anyone have any suggestions?

Try these
https://javascript30.com/
www.freecodecamp.com

I agree with heyheni. Freecodecamp is a very valid option. Maybe give also a look at udemy to see if there are some free courses. Sometimes you can even find coupons so you can take some courses for free.
And when you have finished with that, I strongly recommend you to give a look at jQuery. You won't be disappointed :)

check net ninja on youtube! he have some really good tutorials on css, js, jQuery, sass ect! just go to his profile and check playlists, hope I helped :)

Or, you can work on personal projects:
Does a site you use lack a client-side feature?
You could try to implement it with a Geasemonkey user script. I got pop-up notifications for Twitter and Soundcloud that way, so that I don't need to switch to the sc-tab for knowing which track is playing.
(Greasemonkey is an add-on that automatically runs user scripts when you load a site based on their url)

Definitely go for freecodecamp. The projects i did there helped me get a job.

freeCodeCamp is definitely a great option. Same for JS30. Try givig Practical JS a shot too.

Try building something in JS on the side and keep making improvements as you learn new stuff. I tried out Traversy Media's JS tutorials and it was a good experience imo. Been making new changes as I picked up stuff in them so yeah.

Can't believe nobody has mentioned Codecademy! Its one of the best!

@AlgoRythm codecademy is a great place for a first glimpse of html, css and js. But since Bubbles said he finished sololearn, a similiar styled type of course like codecademy. So he'll need something where it's more up to you to figure it out how js works. In Codecademy everything is predefied.

Yeah go with freecodecamp. It's fun learning by doing.

Thank you all!

Is there any good books I could read?

@Bubbles Eloquent JavaScript's a good read.