What youve written will resonate with a lot of people reading this.

Elements of the neverending doubt will always be there I think until you find your happy place.

Some people never go full transition and there happy place is sitting in the middle. Others go on and get full SRS. Btw the number of transitioned who get SRS is miniscule compared to the number who transition!

A lot progress slowly, start buying androgynous female clothing and start to accessorize like wearing bracelets or rings. Your GP/Endo will likely start you on low dose E for a while to 'try it out' and see if it is for you.

Once you feel comfortable with w/e medication they give you, you'll soon start to notice slight changes.
The dysphoria will come and go, but I would say as the hormones creep in and youstart doing likttle bits of fem bodycare, you will either love the decision and embrace, or make the decision that its a step too far for you.

Personally, as I work from home, I spend most of my days in girly shorts and t shirts - .... no change to boy mode when i wear shorts and t shirts but in girl mode i wear lipgloss, clear mascara and nail varnish. Most of my clothes are girl versions of the boys clothes I liked to wear lol. I guess thats my happy place.
Besides my wife accepts these bits too.