No advice article ever has the courage to say it: you need friends.
Social support and accountability are our main pillars, we are social animals.
Reminds me of "Announcing your plans makes you less motivated to accomplish them (2009)" - https://sivers.org/zipit - https://news.ycombinator.com/item?id=7496923 (74 points | March 30, 2014 | 21 comments)
In light of the need for community, talking about plans might be seen as a way to search for ideas that could have group buy-in and become something to undertake together. Failure to move forward on those plans would reflect that the group interest just wasn’t there. The mistake would have been in assuming you would have ever pursued the goal independently, the social impulse to share could have been the hint.
Shared interests between friends can help individual interests and goals become collective ones.
Ecclesiastes: one may be overcome (by the exhaustion of going to the gym), two can defend themselves (against lapsing on their New Year’s resolution). A three-ply cord is not easily broken.
Making friends is „easy“ too - treating people how you would want to be treated is a good first step.
Some people have so good relationships they even use the label "bestie", which is just a really good friend, who at the beginning surely was a acquaintance :)
Showing up is already a giant step forwards.
Best of luck