The best way to put your new knowledge of the multiplication charts is by practicing with timed tests. It’s going to show you which facts you know and which you need to practice a bit more. Having timed tests forces you to flex this new muscle memory that you are creating. This will help you ensure that you have most multiplication facts memorized.
Learning multiplication facts can be very easy if you focus on memorizing them. Once you memorize them, answering multiplication facts becomes muscle memory. This will help you once you get into more complicated math later on. To start memorizing them, just begin by writing down each family of facts. Start with the x2 multiplication chart and go up from there. Write and rewrite them until you can remember them automatically.