To get good… really is a matter of time. I say that because as we all learn, we examine our game and iron out old bad habits, but at the same time form new ones as well.
IF you really are sold on Ryu being your character, then learn his moves and figure out what situations are best for each one. Understand the spacing for his normals and some really basic combos. Once you get a feel for that and the game in general, start to look more into frame data so you understand which moves are safe on block and which ones have a quick startup.
After that, it’s onto more advanced strategies involving option selects, punishes, and some tricky stuff like baiting opponents. It’s all a matter of doing it bit by bit. Don’t feel the need to know everything in a matter of a week or 2 because if you rush yourself, you’ll forget things along the way and also won’t really get a FEEL for how the game is played.
Also, it doesn’t hurt to request sparring matches with others and have them critique your game. Im an Adon player so I can’t give you specific strategies with him, but will offer general tips. I’m sure there are plenty of Ryu players who wouldn’t mind teaching another player like yourself.