How to use Uniswap on base?

Could you please explain in detail how one would go about using Uniswap on a base level? I'm interested in understanding the fundamental steps and considerations that are involved in the process. For instance, how do I connect my wallet to Uniswap? What are some of the key factors to keep in mind when selecting a trading pair? Additionally, could you elaborate on the transaction fees and slippage that might occur during a swap? Lastly, are there any safety precautions or best practices that I should be aware of when using Uniswap?