how will the adjustment be?

[DeathbySuckout]

I think it would be best for you to start out at the $11s to get used to the Party structure. If you adapt quick and build your roll up a little, then move up to the $22s.
Not sure about the Absolute structure, but if they're like most sites, you're starting with 1500 chips. Party's $11s start with 800 chips, so get used to mucking suited connectors and such. To sum it up in one sentence, play tight early and aggressive late.