Start with the home row
Rest your left fingers on A, S, D and F, and your right on J, K, L and the semicolon. Both thumbs sit on the space bar. The F and J keys have a small raised bump so you can find this position without looking. Every other key is reached from here, and your fingers return home immediately afterwards. This single habit is what separates typists who reach 70 WPM from those who stall around 35.
Cover your hands, honestly
The hardest and most valuable rule is to stop looking down. Your speed will drop sharply at first — this is normal and it lasts days, not months. If the temptation is too strong, drape a light cloth over your hands. Looking at the keyboard forces your eyes to travel constantly between screen and keys, and that round trip is the real ceiling on your speed.
Accuracy first, always
Set your target as accuracy, not speed. Type slowly enough that you make almost no mistakes, and hold that pace until it feels effortless, then let the speed creep up on its own. Practising fast and sloppy teaches your hands the wrong movements, and unlearning them later takes far longer than learning them properly now.
Fifteen minutes a day beats two hours on Sunday
Typing is muscle memory, and muscle memory is built by frequency rather than duration. A short daily session will take you further in a month than occasional long ones. When you do practise, use the Weakness Doctor mode here — it builds word sets from the specific keys you have been missing, which is far more efficient than typing random text and hoping.