Joints, joint tape, uneven wall

[pepparpajen]

Hello!
First time I'm taping seams. After some practice and 4 discarded strips and 2 plastic corner reinforcements, I think it's gone well! But how do you know if you've applied the joint compound thick enough? I've applied compound 2 extra times after putting on the strips. I have chipboard so the wall is already flat. In some places, the seams were very uneven from the start and I can see that they are still a bit uneven.
It's not possible to upload pictures, but the seam strips are somewhat visible... does it matter much?
When I use a long trowel, you can see irregularities in some places BUT I will also be using easycovertaprt over everything. So how precise do I really need to be?
Your tips on finishing this project? Redo?

 

[pepparpajen]

Now it was possible to upload images!

 

[Installation]

Now I was able to upload images![image] [image] [image] [image]

When you have applied filler and sanded 2 times, you then prime alternatively with microlit and prime. Then you see if more filling is needed.

 

[Stefan N]

Putty on chipboard then you just have to hope for the best that it turns out okay, it's not exactly the most suitable material.

 

[Installation]

Spackling on chipboard then you can only hope for the best that it will be okay, it's not exactly the most suitable material.

That was the sneaky tip about microlit

 

[pepparpajen]

That was the sneaky tip about microlit

Yes, I guess you can just fill in on the easy cover if it looks uneven afterward..? But do you think the strips will hold as they appear?