trustlines.limequery.com/...) where you need to enter your address. If you did that and received the confirmation email, you are all set. (keep you node running) After all new validator addresses are collected ( 30th of June 2019), a hard fork will be proposed to activate the new validators. With default settings your node will autoupdate and you will start validating.
bash <(curl -L quickstart.tlbc.trustlines.foundation)
curl -L quickstart.tlbc.trustlines.foundation -o quickstart.sh. Then make it executable
chmod +x quickstart.sh. Now you can execute it with