Guessors uses smart contracts anchored to Bitcoin.
Download the Leather wallet on your desktop browser (Google Chrome), or the Xverse wallet on your IPhone, Android or desktop computer. You will find the overall experience easier on desktop.
Create a new wallet and securely store your seedphrase on a piece of paper. Basically, just follow the prompts.
You will need a small amount of STX to get started (less than $1). You can purchase STX from within your newly created wallet or from a digital asset exchange (e.g., Coinbase).
Next, you will need to acquire a gate token here. Once you have a gate token you can begin forecasting on Guessors.
When forecasting, make sure you select/pay only a very small amount of STX, usually less than 5 cents.
Alternatively, you can reach out to the project admin to request a small amount of STX and a gate token to get started.