I'm getting overwhelmed when attempting to customize my theme, how to make it easy?

I'm not interested on the programming part of design. Customizing your theme and place the elements where they should be in order to make a proffesional user interface is still web design. How can I make this part easy? I'm getting overwhelmed, I tried to find sites on a similar niche in order to copy them but they are far more advanced most of the time and their design is based on that. I just want to build a very simple 1-2 pages site without testimonials etc. I just don't know how to do that.

Also, I have trouble finding high quality images, where should I search? I can't create my own. I'm really interested in the user interface design skill for websites.

Images search is Google high res.
Themes buy a good one. Builder use elementor

Search for bootstrap template ?
Also bootstrap can easily customise your site

I feel you. Even for me it overwhelming, I not a beginner, still sometimes it is hard figure out how it is done.
Try to focus on CSS, install a paid themes on your local machine / VM and see how it is done. Once you get the hang of it, you will get better and better.

A lot of paid themes can be downloaded here at BHW.
I personally don't use these themes for production, I use these for educational purpose only.
Somehow I don't trust these free obtained themes.

Hi i would suggest to you , buying or downloading null version of somekind of drag n drop website builder , for ex. avada , divi etc.

or suiting simple site with elementor if you dont have money + photos from some free CC license you can find out there lots of them.

here is example https://burst.shopify.com/