Exposure? Scrutinizing?
If you are worried about what the banks will think here's an inside tip: The cc companies like it when you put spend on your card. (Obviously don't go over your credit limit, or spend what looks to be more than you can afford based on stated income.) They get paid every time you use your card. That's actually the very business they are in.

If you are worried about keeping track of your expenditures, just take 3 minutes a day to look at your cc bills online. Then if anything is out of line you will see that immediately, and if necessary you can call the bank to question a charge. That will also mean you don't build up too high a balance to have to pay when it comes due. If it starts to build up, don't wait for the bill, just make a payment from your checking account.

I put my annual house insurance on a cc ($1k+), and then if I buy a bunch of cilantro at Safeway for $0.69, I put that on a cc as well. The only things I don't put on a card are taxes, and some utilities, that charge a substantial fee for using a card. I've been doing this for several decades. All the banks say when I call in is "thank you for being such a good customer".

Just make sure that if you spend more than 2% of your credit limit in any billing period that you pay most of that off before the bill posts. That keeps your credit utilization score very low, which adds to your FICO score.