Designing a Carbon Monoxide Detector with Arduino for a Car Project

Projects General Guidance
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Hi everyone,

I'm working on a project to detect Carbon Monoxide in cars using Arduino. It's my first time trying Arduino stuff, and honestly, I don't know much about it. Here's what I need to connect:

2 MQ-7 sensors
1 Display (I think OLED would be cool)
1 GSM Module
1 Relay to control a power window motor

Now, the big question: Can I use just an Arduino Uno, or do I need a different one? My main worry is having enough pins to plug in all this stuff without any problems. Any advice or suggestions would be great! Thanks a lot!