$3k about $300 move liquidation (tried to edit) on a 10-btc long or short perp futures position, that's about your range of stop loss
Sure, do you have a chromebook or an old laptop you can install Linux with a DE (i.e. Linux Mint, Ubuntu Mate Desktop)?
If you have any of the above, those are secure OS environment, then the next step is to install the google chrome browser extension called Metamask, this is your crypto wallet that can store many different types of tokens and coins and can connect to any web3 crypto platform and many different blockchains, Ethereum, Binance Smart Chain, etc
Install Metamask is your first step, but only on those secure OS I mentioned. Don't trust Mac or Windoze
https://metamask.io/