The Alpha ring, for example, is now able to test the new dashboard design that was announced recently, before this trickles down to Beta and the newly branded Delta and Omega tiers. We've enjoyed seeing that you, our community, share that same goal. The feedback can be given through the insider app. Microsoft is introducing some changes to the Insider Program that will make it easier to opt into the Insider Program and give people more access to testing opportunities. For those in the Delta ring, some will be selected (randomly it seems) to receive earlier builds than others.
Obviously, more system updates means more bandwidth taken up downloading them. What's more, those who own multiple consoles can enroll those consoles individually into any of the Insider rings for which they're eligible using the same gamertag across each. According to the press release, Insiders on both Xbox One and PC have already been given access to Sea of Thieves, and earlier this year some users were able to play Paladins weeks before release.
The Creators Collection is available on the Xbox One store as a button under "Addons" near the top. If you are concerned about the number of updates or bandwidth issues, you can move to one of the lower levels.
There will also be developer workshops at flagship Microsoft Stores in NY and Sydney to help people get up to speed with building games for the Creators Program. Not yet an Xbox Insider and interested in joining the program? There won't be any achievements or Xbox Live integration, but devs will get access to Game Hubs, Clubs, and algorithmic promotion on Microsoft's various app stores.