That is a common perception from newbies including myself especially if you are coming from any platform that promotes sweet spot training. There are many expats and converts here. 
See this thread as an example –
How accurate are the TP predictions for the training programs? I think mine is way off - General - Xert Community Forum (xertonline.com)
Thanks for completing the profile questionnaire. Hopefully you’ve had a chance to read through the “Beginner questions” thread as it’s packed full of newbie tips.
You are at a disadvantage on a 30 day trial since the workout library is limited and Base phase alone is 45 days long. However, you can adjust TED (target event date) to jump between phases or use Filter to right of Recommended Workouts and select different difficulty and focus duration (athlete type) to get a better idea of the range of workouts.
GC Specialist is a good place to start. You can change it later to match your target event focus as you move past Base phase into Build.
Generally things don’t pick up until halfway into Build but that also depends on focus duration (athlete type) and IR (improvement rate aka ramp rate).
Also consider your current training status (star count) determines which workouts are recommended. At two stars your won’t see any four diamond workouts recommended without using the Filter option. Of course it’s also unlikely you can complete a four diamond workout at two stars but you will get an idea how much harder they are.
I am not sure if the trial includes any hardness test workouts. Search the library for “hardness” and see what comes up. There are 19 in all ranging from two to five diamonds with the idea you start at your current status level (two stars = two diamonds) and test yourself over several weeks to see how far up the ladder you can go.
If signature still feels off after a BT workout attempt (see tips for doing these in the beginner thread) you can always file a request with support@xertonline.com and they’ll take a look at you historical data and adjust your signature if required.
Related – Compare Plans – Xert (baronbiosys.com)