This tool https://www.tablesgenerator.com/ is a lifesaver if you are trying to convert Excel tables to LaTeX format.
LaTeX tables are notoriously difficult and tedious to write manually. If you already have an Excel (or .csv) table, you can easily change it into LaTeX format using the website above.
Just go to File -> Paste table data. You can literally copy and paste your excel table into the online tool, and it will convert to LaTeX format for you. It will take no more than a few seconds!