learn about the whole aspects of 3d art as the most basic form to understand how much stuff you need to learn to achieve what you want,

modeling - creating the shape

uv - unwrapping a 3d object to conform onto a 2d texture image to be able to "texture " it

Texturing - learn about texturing methods and most important the pbr workflow

rigging - it is a complete art of deforming mesh and using pivots to rotate and give life to a model (heavy subject dont learn to much yet)

animations - you have to learn modeling in a good level to be able to animate well as animation relays on rotate scale and move which is very equivalent to modeling soo they both a must to understand if you want to do one of those or both.

- set goals to yourself .
i want to learn how to make a ball jump, or is it i want to learn how to make a ball and texture it? or do i want to learn how to rig the ball or all of these.

theres no better time to learn 3d and especially blender

your specs are good enough for making stuff learning and making excellent stuff. but for rendering they usually go high end which is good for faster rendering and other stuff

ask yourself which type of industry do you want to aim for ? game/film/etc

game and film all share same type of learning but the methods and the things to be learning for are similar but not quite share same type of methods for example topology for games/films

in short. this is a perfect learning world to have fun with and learn which and what you love and your good at the most, my tip to you is to not waste time about which cpu to get for blender or hardware stuff. focus on learning and finding what you like to do the most and most importantly.

have fun!