Starting in Monterosso hiking into Vernazza allows you that famous view of the village as you arrive, but you do have quite a few (hundred) stairs to go up to get there. Hiking the opposite way is a little easier.
Keep in mind that though most likely by July, the trail status will change, but for the past few years, the blue trail between Manarola and Corniglia has been closed. The whole portion is closed as of right this minute, but will most likely be open by the spring season as they are repairing portions through the winter. The higher trails are always an option, though more challenging, as well are some of the other trails in the region (i.e. Levanto-Monterosso, which is wonderful too).
Check the national park website for details as to trail openings: