I remember that exact feeling - trying to learn the ropes while delivering for real clients. It's brutal. Burnt out twice myself before I figured out what actually works.
The biggest thing I learnt was to pick one platform and get it right before adding another. I tried Facebook, Instagram, and Google all at once and did a mediocre job on every one. Dropped down to just Facebook for the first client. Once that was running smoothly, I added another. Consistency beats perfection at the start. A decent post every day is better than a flawless post once a week. Your audience will forgive basic design - they won't forgive silence.
Daily posting is overrated for most SMEs unless you're in fast-moving niches like news or fashion. Three to four times a week on Facebook is plenty. Use the extra time to reply to comments and messages - that builds way more trust than another Canva graphic. A beginner should manage one platform per client until you feel bored. Master Facebook first, then add Instagram, then Google. Most SMEs don't even need all three.
You're ready for ads once you have a dozen or so organic posts that got some genuine engagement. Run a fiver a day for a week just to learn the dashboard. Don't spend real money until you know what a good post looks like. Organic growth should come first because ads amplify what already works. If your organic post gets ten likes, ads will get you a hundred. But if organic gets zero, ads will get zero too.
Metrics to focus on besides followers: engagement rate (likes + comments divided by reach) and response time to messages. Followers are vanity. Replies are sanity.
Avoid burnout by batching content. Spend one Sunday making ten posts, then schedule them in Meta Business Suite. Don't touch social media again till Thursday. That saved my life.
The biggest mistake beginners make is trying to be everywhere at once and doing none of it well. You've already spotted that. So drop the extra platforms for now. Get one client running smoothly. Then scale. You've got this.