Trading is not just what you will start, and you will be expecting profits immediately. Before you can start making money from trading, you have to make sure you accumulate knowledge first. If you are not knowledgeable about trading, no matter the amount you deposit to trade with, you might end up losing everything to trading.
 
Also, the amount that you are planning to trade with is just too small, how are you going to trade with $1? I don’t know any exchange that will allow you to trade such a small amount of money. The amount that you are planning to trade with might be what you will be using for the exchange fee, so if you want to trade, it’s better that you get some reasonable amount of money and a deposit to trade with.

I'm sure you can raise a minimum of $10 because it's not a big amount but if it's $1 to trade on multiple exchanges then you won't be able to do it exchanges also have limits where you have to trade a certain amount.

Yes like other advice it is better to collect more money first so that you can trade or invest, don't expect you with $1 it is normal because it needs other costs.

If you want to learn trading and increase your knowledge for free we have plenty of trading exchange platforms that offer demo trading.
It uses virtual funds that you can practice and enhance your knowledge using different techniques and analysis, unlike actual trading which uses real money that could be a reason for losing it.

That's a very small amount in trading, it could be eaten by the fees, remember in trading there's a corresponding fee that you must pay.
1$ isn't worth it to try.  It's ideal to try above my suggestion if you don't have yet an idea about trading.