USDT is fairly simple to use. When you have account on exchanges such as Remitano, Poloniex... that support USDT, you then have USDT wallet. It can be easily transferred from an exchange to any Omni Layer enabled wallet. Or you can also create your personal wallet as following instruction: 

We are going to show you how to use the Tether.to Platform.

Step 1: Click here to go to Tether.to

Step 2: Click “Signup” to create an account

Step 3: Fill in your personal details and click “Create Account”

Step 4: Your account will be created. In order to use it, you must activate 2-factor authentication, which will also add an extra layer of security to your account. Click “Security Page”

Step 5: Choose the method to activate 2-FA with. We’re going to choose “Google Authenticator”

Step 6: Scan the QR-code (1) or type the code (2) in Google Authenticator

Step 7: You will be given a code (Which changes every so often). Type the code in and click “Enable”

2-FA is now active. You’ll need your phone to access your account, so make sure you don’t lose it.
​Step 8: Now go to your email address and click the activation link sent by Tether

Your email will be confirmed

In order to deposit or withdraw USD, you must first go through a verification process

Step 1: Click "yourusername" on the upper right corner

Step 2: Click "Verification"

Step 3: Choose "Individual Verification"

Step 4: Now scroll down. Take some time to read the information displayed as it will help with the verification process
​Step 5: Click "Continue to Individual Verification"

Step 6: Complete all sections displayed to fully veirfy your account. Click "Begin" to start each section

Sending and receiving USDT is pretty straight forward. You will be given a Bitcoin wallet address which you can use to receive USDT funds. All you need to do is go to "Add Funds":

You will be shown a wallet address which can be used to receive USDT or Bitcoin:

To receive funds from your bank account click "Fund from Bank" and follow the instructions shown

To send USDT or Bitcoin simply go to "Send Funds"

Then simply enter the Bitcoin address and amount of USDT you want to send. To convert and send USDT to your bank account click "Withdraw" and follow the instructions shown

Lastly, you can also convert your BTC to USDT and vice-versa. Simply click "Convert" and  follow the instructions shown

And that's it! You can now use USDT freely. Remember that to convert USDT to USD and vice-versa you need to verify your account. For more explanation of what stable coin is, please check out this video:

(References: cryptocompare)