Just be aware of potential mine fields.
Yes, if you are taking summer classes “informally”, with the purpose of helping/preparing you academically as needed, it’s a different animal. You absolutely do not want to have to be dishonest by having/hoping to “hide” transcripts - that’s never a good start into adult life!
The same applies to courses at a Community College, or similar. Don’t overextend yourself and your time, hoping those might increase your admission chances later. It will be more important to have replenished your energy over the summer, so your High School transcripts and standardized test results are great - those will be the initial selection criteria at many colleges, before they start looking further.
So it’s okay to want to show commitment/interest by taking a summer program. But, it’s a fine balance, because this is not a sprint, it’s a 3 year marathon!
Most important for you is to find a pace that you can sustain mentally.