First post but a long time Mac user! 
I've just ordered a 2020 MacBook Pro 13 (i5/16GB/256). I rushed into the purchase seeing the 0% finance option and trade in value for my 2017 model through a 3rd party. Now I am starting to have buyers remorse. I've got the following concerns:
Please help talk me out my buyers remorse, I am terrible for this!

I've just ordered a 2020 MacBook Pro 13 (i5/16GB/256). I rushed into the purchase seeing the 0% finance option and trade in value for my 2017 model through a 3rd party. Now I am starting to have buyers remorse. I've got the following concerns:
- Won't see a huge performance increase from my 2017 MacBook Pro (i5/8GB/256GB)
- Am I going to struggle with only 2 Thunderbolt ports
- Will my Dell WD15 dock allow me to use 2 displays. Currently it duplicates the extended display on both monitors so need to use an additional adaptor. If not supported, can anyone recommend a dock that supports 2 external displays using one Thunderbolt port?
- Should I have bought the XPS 13 9300 with Core i7/16GB/512GB for £100
Please help talk me out my buyers remorse, I am terrible for this!