Optimization Score: I would not worry much about this. It’s worth seeing what Google’s recommendations are to improve the score, but you could operate a campaign successfully at a very low opti score if Google’s recos dont align with your goals.

Gradual Budget Increases: It’s likely not necessary to increase that small of a budget in 10% increments over time. It does take time to learn and optimize but expanding your budget more quickly probably won’t hurt.

Number of Keywords: at a $10 daily budget I would figure out what the top keyword is and focus on targeting that. I’d rather spend $100/day on a keyword that consistently converts than $2/day on 50 different keywords, when 45 of them never convert.

A few tips here:

1. Look at Search Impression Share. You’re likely not capturing much (Google will show <10% if it’s anything under 10%) unless you’re targeting very niche keywords. If you focus on putting more budget towards a smaller group of keywords you should see your impression share (basically share of voice in Google ads) begin to rise.

2. If your budget is that small, either only target exact match keywords, or ensure you’re reviewing search terms to apply negatives religiously. You’re likely wasting money bidding on keywords that aren’t very relevant if you have tons of broad match.

3. Use Google Ads keyword planner to learn about the search volume for potential keywords you might target. It will let you enter your website and then dynamically pull a list of potential keywords, search volume estimates, and CPC estimates.