Selection method/drawing in a vehicle

I use the pro version on a pc or mac for large projects, but I bought the ipad as I am on the road for work a lot, and I thought I could use the trip time to complete drawings. Trying to select vertices or anything precise is almost impossible. It would be great if something like the lasso tool could be used to select vertices when drawing, moving etc. Basically rather than long pressing, circle the vertices for origin and draw as normal using inference and directional locks. Maybe this is already doable, but I havent figured it out.