Let me tell you how to fish for your needs i am in the same boat.
1. Processor - i5 7200u would be more then enough for you can below that too
till i5 6th generation.(2 physical cores are more than enough for you).
2. Look for the 2 slots of the ram[DDR4 BETTER] in the laptop.(speed is better than 1 slot
3. Prefer an SSD(solid state drive instead of the HDD) better bang for the speed.
4. Buy an external hdd to store rest of the data if you feel SSD capacity is less .
you can look for the benchmarks website but take those reviews with a grain of salt and check for the "real life speed" scenario differs courtesy is http

/laptoping.com/cpus/product/intel-core-i5-8250u/ (the real life speed difference is only 0.95seconds in i5-8250U...