OP, you’re massively sugar-coating this.
Gross misconduct just isn’t a little mistake. For most companies it encompasses situations that have arose from theft, security breaches, etc.
It’s actually difficult to get sacked from a job, especially if you’ve been there over 2 years. I’ve seen situations in work where a case has been built against a person for dismissal over months, if not years, because everything has to be properly documented and dealt with appropriately each time.
Unfortunately if you do something horrendous enough for immediate dismissal then it will affect you in the longer term, especially if you live in an area where everyone knows each other’s business.
If it was me, I’d be leaving that industry and going into a completely different field, and commuting to work if not moving home entirely, just so I had the opportunity to start afresh.
Actions have consequences and unfortunately you’ll be dragged into those consequences.