My first suggestion is that you forget about what tier you should be applying to for now.
Second, read the article I’m linking which gives you a process to follow to come up with your list. Answer all 10 questions.
Third, sit down with a copy of The Fiske Guide to Colleges or similar book of essays about selective colleges and read about as many of them as you have any interest in. If you’re unsure whether to include a college, include it. The goal should be to see which schools might be a good fit for you, based on your answers to the questions in the linked article and anything else that seems important to you. The Princeton Review college guide can be a helpful supplement.
Fourth, you now hopefully have a list. If it’s too long, break it into categories of high interest, moderate interest, and low interest.
Fifth, now you can start looking at tiers. A school which accepts less than 20% of its applicants is a reach for anyone, meaning that they inexplicably reject even what appear to be some of the best applicants. Be prepared for that. A second group of schools should be those where your numbers fall in the middle 50% (target schools). Be sure then you include some others (safety) where tou’re Above the 75th percentile and at which you’d be happy to enroll.
Sixth, you should now have a list of schools to visit. Don’t use visits to browse as your first step. Only visit after you’ve refined your interests and acquired information. Then you can visit with specific questions as the last step to see if you really think you can fit. Normally the best time to visit is February because students are on campus and the weather is horrible. If you like it in February, you’ll love it when the weather is good. But these are not normal times, so grab the opportunity when you can, preferably when students are on campus.