Head over to https://upvest.co/ and tap on 'Arweave Wallet'
Sign in to Upvest. You should already have login credentials from when you created your Upvest wallet, and if you have forgotten your password you can tap the 'Reset' password link. In the event that you have forgotten both your email and password, fear not, Upvest can work some magic to help locate your account credentials with their recovery kit. You can do so by contacting email@example.com
Tap the 'Send' button under your Arweave wallet
Input the amount of AR you would like to send and paste your Arweave wallet address into the Recipient field
Review the transaction and once you're satisfied, input your Upvest wallet password and press 'Confirm transaction'
Next you will see the transaction receipt. And that's it, you're done!