Can I switch from Easy start to self employed and transfer over invoice activities and services. Even just info from this year?

QBSE is a stand alone produt and no migration path yet. You can export your bank transaction using a CSV file and import it into QBSE.

If you have to open a new QBSE account, make sure to click the Buy button to get the discounted price for up to 6 months. If you purchase from the trial account, you have to pay the regular price.

https://quickbooks.grsm.io/Canada