Help with specs

I want to start of by saying I'm completely clueless about this. My budget is 800 euro right now. Before i list what I need, I just want to say I'd rather save up than get something sub par. With that said , I'd also like not to overpay for specs I don't need. Also, I'd like not to go with apple.

I need a light and portable device, not too big. I would use it for photo editing mainly, so I need it to run Photoshop and Lightroom efficiency. The screen colours and resolution are important as well. Battery life is important but in the sense that I'd be annoying to have it die 30 minutes after being unplugged; I don't need the worlds biggest battery.

My current choice is the lenovo IdePad Gaming 3 82K202CKSC. Is it any good? What are your recommendations/specs I should look for?