You might like to check out
to see exactly how your visualizing capabilities compare with others. You say that you "can picture things in a general foggy way that I'm assuming is normal." but you may find that you are well below average (for a few people the picture in their head is the same as normal sight). In that case you will have to adjust to this situation, and advice about how to use good visualization will have little value. Even if so,
your situation is far from hopeless.
I am myself extremely aphantasic. I see no mental images (and do not imagine any other sensory experiences) which puts me in less than 1% of the population. But my best rating (many years ago now) was 207 on the old British Chess Federation system. Roughly equivalent to 2300 FIDE and maybe 2600 Lichess (If you check, you will see that I have fallen far) I have played blindfold well enough to beat a weak player. Strong visualisers find this hard to believe.
I can see a great deal from the current position and forecast quite far into the future without in any way seeing the future. Questions such as
Where are my and my opponents weaknesses?
Are my pieces harmonious (Supporting each other but free to move)?
What is the balance of attackers and defenders for some vulnerable piece
Which pieces do I want to exchange?
Where should I direct my attack?
do not (at least for me) require any visualization. Neither do short combinations. I know where the pieces will go without having to see them.
I do occasionally mess up. At the end of a combination I have to ask, is that mate? I check each square around the King and ask which of my pieces is covering it or which of my oppenents pieces is blocking it. I can do this by recalling which moves each piece has made, but sometimes I forget.
In the immediate position I do not have much difficulty "seeing" possible
moves that are enabled by a pin, or by a fork on the following move. There is a difference here between seeing and perceiving.
My advice to the OP is as follows. First establish how (ab)normal your visualizing ability is, Many people do not discover until quite late in life that they are different. If you do discover that you have aphantasis, it is a permanent condition and there is very little you can do about it. Ignore all the advice about how to play blindfold. Concentrate on what you can perceive in the position before you. Ask the questions that I suggest but make up your own. How much can you make use of what you CAN see?