Unclear on Pricing for Uploading Contact Lists & Quick Automations - Any Limits on Importing/Exporting?

Hi all, I have a pricing question. In the middle of the free trial now but unclear about pricing for my current use case: at the moment most of my usage is around uploading contact lists and performing quick automations involving formulas, merges, etc...and not necessarily data enrichment, email validation, etc. Basically a glorified spreadsheet for me, right now. 😂 Are there limits on importing and/or exporting and what tier would I be at?