You shouldn't need to push down with a fine liner but just simply lower it onto the page and they perform best when held perpendicular to the page. If you are angling the fineliner there is a chance the mark could be less solid overall.

I honestly don't have much more advice to you other what I said previously.

Execute your line with confidence and don't concern yourself with accuracy during this step and try and rely on the muscle memory you built up ghosting

Make sure are ghosting your lines multiple times and you almost want to make your mark without thinking. Rely on the muscle memory of the motion you ghosted previously. The thinking is what causes your hesitation and all of your thinking should be done while you put down your dots and are ghosting the mark. Eventually with consistent practice this will become somewhat second nature.