My neck wrinkles are deep.

It’s driving me crazy because lately, every time I look in the mirror or take a picture, all I see are neck wrinkles..
I've been pretty diligent with my skincare, so my facial skin is... just about average.
Maybe it's because I don't take care of my neck, but the horizontal lines are deep.

I have a habit of sleeping with a high pillow, and maybe because I'm always looking down at my phone, I feel like my wrinkles are getting deeper.
I finally realized how serious it is, so I bought neck cream and have been applying it, and I've been watching YouTube videos and doing neck stretches whenever I get a spare moment before bed... but maybe because the wrinkles are already there, it doesn't seem to be of any use.
Having neck wrinkles makes me look older for no reason, and I get really self-conscious when wearing low-cut clothes, so I'm looking into getting a procedure.

I'm conflicted because some say I should get fillers for horizontal wrinkles, while others say I need to get lifting lasers or skin boosters.
I'm scared because the skin on the neck is thin, so I heard side effects or nodules can form... Which procedure is the most effective and painless?