My first thought was 'O dear'. Then, I realised how unjust this attitude was because I, and perhaps many others, have gone through the same thing. I came from being a fairly proficient Autocad user and took a year to shake this off. Like you, my first jobs took much longer in Archicad than what I had gotten used to because I tried the product as a fully functioning demo - without training. Bad mistake - sent my copy back after 3 months! When I did buy, about 6 months later, I made sure that it included some hand-on training and this made all the difference.
I think that some basic training is the answer. Your Archicad reseller should be able to help - if he wants to sell his product. You certainly shouldn't need professional level training to get going, although this will help later. The training guides are OK but having someone sitting with you to show the basics is much more efficient. Don't you have some friendly users in your area who are prepared to give you some time if your reseller is unable to help? I've always found the Archicad community a very friendly lot.
Cornelis (Kees) Wegman
cornelis wegman architects
AC 5 - 26 Dell XPS 8940 Win 10 16GB 1TB SSD 2TB HD RTX 3070 GPU
Laptop: AC 24 - 26 Win 10 16GB 1TB SSD RTX 3070 GPU