Welcome! Post whatever you want, but be aware that there is no real delete button. You can request deletion, but because Nostr has multiple clients, posts may still appear on other clients. Unlike twitter where "drama sells", here, "value sells", that is, if you write stories from your day, are encouraging, commiserate with someone, share insights, or create a product. If you are bettering your life, and such, that's way more likely to get engagement here. I love the positivity Nostr has.