Since there is no algorithm for probably 95-99% of the clients that run on nostr (can’t be sure, new stuff comes out daily), hashtags are the best way to find new content, people and also to get seen. Find cool stuff that you like, share, comment and follow the creators. Post and hashtag stuff that you find cool and do all of it consistently and you will build a good following and also have a feed full of cool stuff. If you want to get tips, you’ll need to link a Bitcoin lightning wallet to your keys in your profile usually.