Sure, super Reader's Digest version:

Build credibility. Don't cry wolf. Wait until the facts come out about an incident before screaming that the police abused their power. A prime example is the cop in Columbus, Ohio that shot a girl who was literally in the process of stabbing someone. The keyboard warriors spent a good day or two calling the cop a racist monster. When the bodycam footage came out showing his saving another girl's life aforementioned keyboard warriors lost a significant amount of credibility.

Set reasonable, possible demands. Do your homework. Learn how and why police departments operate the way they do. Learn about civics and public budgeting. Learn about the needs and perceptions of the public outside of internet echo chambers. Do not demand police stop responding to a certain type of call (mental health calls for example) until an alternative is in place.

Create a nonprofit, transparent organization to build credibility (see step 1) and communicate goals (see step 2). A lot of BLM organizers took the money and ran. Transparency is important in order to garner donations, support, and public trust.

Rebrand and ditch the extremists. Defunding the police without an alternative is not reasonable. Abolishing the police is not reasonable. Saying "it's a tag line, our actual policy is ..." is bullshit - that's bad marketing that turns away anyone with even a basic understanding of civics. People haven't forgotten the riots four years ago. Anything that smacks of street violence is a no go.