I did English Lang & lit HL and German Lang & lit Sl and it wasn’t too bad. Of course it’s different to just literature, as you read less books, but there are many parallels. Just make sure that you read enough of the books during DP 1 and get as many Written tasks 1 and 2 done as soon as you can. If you manage to stay on top of all this it works out quite well.
As there are many parallels it is very helpful, yet there are times where you need to distinguish between the two.
If you don’t love reading, I would suggest you take one of the two as a language and literature course, which is also very interesting.