I recommend studying code patterns and what they are translated into assembly. Then you can try tackling some crackmes.

As a beginner you can also start a bit  more high-level with practicing reverse engineering. Decompiling a dotnet or java application for example.

For dotnet you can use ILSpy for example and decompile to C# and MSIL (MSIL is more or less the assembler code of a virtually emulated dotnet CPU). Studying the difference between code you wrote yourself, the reversed/decompiled C# version and the MSIL version can give you a good start in understanding code patterns and how they would look when you reverse engineer them in a low level language.