The trick for anything is time and consistency. Choose two or three things from this list and plan when you will devote a few hours each week. During your “practice” time, find and use learning resources online.
Some of these ideas are also shorter-term kind of forming things (like avoid brain rot, touch more grass), so I would also dedicate time weekly to think of/plan concrete changes in your life to accomplish them. Rotate through the list until the habit is fully formed.
The poll seems to cover Democrats and “Democrat-leaning independents,” so not the DNC.
Exit: can’t find the actual post on Morning Consult yet, but the article features an image where they specify the polled population.