Welcome, here are my recommendations.
Get a larger rack you will need it.
VCAs and attenuators- I recommend these as they are mandatory for any modular system. 2HP makes small one.
Noise Engineering Basimilus Iteritas Alter (BIA) a beast of a percussion techno module
Modulation sources: you need them. Consider something like a Make Noise Maths and Batumi quad LFO.
Mixer- a small mixer like Intellijel mixup would be super useful. Happy Nerding makes nice small mixers as well for Eurorack.
Logic- Kinks is a great small one for that and more.
Mults- Links is super helpful
Here is an improved rack to show you what would help you reach your techno goals:
I also suggest that you first download a free copy of the VCVRack software and try out various patches and different modules. This greatly helped me when I started working with modular. Most of your setup will need to be support and utility modules- boring but essential. Stuff like envelopes, attenuators, VCAs, sequential switch and so forth.
Cheers,
Sacguy