Your best bet would be to watch some youtube videos to learn advanced F2L. You can learn F2L from here: How To Learn F2L How To Learn F2L Intuitively . The video is not only 9 minutes long. Although you probably will take much longer to get used to the idea of F2L and it will take a few weeks until you get good times with it. At first your solving time will skyrocket. But don't give up! If you practice a lot, you'll get used to all the different cases and you'll be faster than ever. After you have masered F2L start practicing look-ahead. Look ahead is basically slowing down your solves but making the solve smoother by thinking of your next move while doing your first move here is an exercise to improve look ahead:
Solve the cross and find a pair.
Now close your eyes, and don’t open them until you have inserted the pair.
If this is easy for you already (hopefully it is!), then try this:
Start out with a paired up pair on the top layer.
Now find another pair, close your eyes and insert the solved pair while mentally tracking the two pieces of the second pair. Solve that one as well and open your eyes.
That was a bit more difficult, right? Practice it until you’ve got the hang of it. Once you’re completely comfortable with the intermediate example, you’re ready to move on. Now find two unsolved pairs, close your eyes and solve both. This is VERY frustrating at times, but it’s one of the best practices there is.
Of course, you can’t keep doing boring exercises over and over again, so when you are ready for real solves and want to keep improving your look ahead, here are some important things to note. Start off by FORCING yourself to not look at the pair you are solving. I don’t care if you trace top layer pieces or just close your eyes to avoid distraction. It’s not easy, but it’s a GREAT feeling once you get the hang of it. Just DONT LOOK AT WHAT YOU ARE SOLVING!
After that, just keep asking yourself, did I look at that pair I was solving? And if the answer is yes, force yourself to stop it.
After much practice (hey i’m not even there yet) You’ll just never look at the pair you are solving, and voila! You’re Feliks.
All kidding aside though, I think those are some of the tips and practice methods around. Now go practice
For more information watch this video: https://www.youtube.com/watch?v=bHvoKuN-0c4.
And to help you understand algorithms
Read these articles: https://ruwix.com/the-rubiks-cube/algorithm/ : https://ruwix.com/the-rubiks-cube/notation/ --
You can print this pdf to remember the algorithms: http://www.kungfoomanchu.com/home.html#333
PS- I would advise you to learn 2 Look OLL and PLL before you learn 1 look Oll and PLL, And please link to the pdf's that are hard to understand so I can help you with them.