Great pick and a fine review. I agree with this as an innovative worker placement/resource management game that is easier to pick up then many others in the genre. If this feels a little daunting to you other options I would recommend include Caylus and Pillars of the Earth. In the former you use workers to obtain resources in order to build work spaces that other players can use; however when they use them you get rewards. The game has various special neutral spaces that players can use in order to gain certain additional benefits and each player may also (should also) use their obtained resources to contribute to the construction of a castle for the benefit of the king. By doing so players gain points and bonuses (called favors) that become more robust as the game goes on. The game is a bit easier to get into than Tzolk'in because advanced planning is easier and the array of option somewhat more straight forward (some would say Caylus is fired by Lords of Waterdeep but I own both, play both and prefer Caylus).
The later has players bidding for turn order, then placing workers of various spaces in order to gain certain privileges, obtain certain resources and take specified actions. As in Caylus, the ultimate objective is to contribute to the construction of a central communal project, namely a cathedral. Again, advanced planning in Pillars of the Earth is easier than in Tzolk'in. However, Pillars has a unique action sequencing mechanic that adds a flare that I quite enjoy. Also, the privilege cards make for some fun and interesting game dynamics.
I am not bashing Tzolk'in, by any means, and can see it as a great entry into worker placement, but I just wanted to add a few other options that I have found to be a little more accessible. Another option that many people like very much but which I find to be a bit repetitive and flat is Stone Age, largely considered by many to be the ideal gateway worker placement game.