Beyond the general app recommendations, here’s some more advice
Take a moment to read fedi.tips
Hashtags are your friend. Follow them. Use them. Capitalize each word in them
You will miss things. That is the point
For accounts you don’t want to miss, click the bell in the profile or make a list
Boost the toots!
Be here to make connections
No algorithm means post what you want
Add alt-text to images
Football manager looks like