I don't know what exactly you were trying to do, but the steps are pretty simple 1. Download Metamask. 2. Deposit your tokens, or purchase them from metamask.

I don't know what exactly you were trying to do, but the steps are pretty simple 1. Download Metamask. 2. Deposit your tokens, or purchase them from metamask. 3. Go to Uniswap. 4. Swap.