hello,
First of all, Thank You for using our Theme.

”Alexander Scottish
This text is in the middle and the description only shows up to “HI Im a” ”’

Ans: go to page > find out page name ”Alexander Scottish” then you edit a page title and content and change feature image as your wish

”’MY SERVICES
This also shows only one line.”’

Ans : go to appearance > widgets > homepage widget area > AT:service widgets (https://prnt.sc/qm9oj2) , you need choose a page for set up service widgets.

”LATEST BLOGS
This means that you can only select the button all and one more, and only three articles will be displayed.”’

Ans: You need to make a category for your blog and select an associate category for post and go to widgets >HomePage Widgets Area > At: Latest blog widgets (https://prnt.sc/qm9rk3) , you need to choose a category for your post.

you can check this https://youtu.be/BggfH64xqII video tutorial to setup whole site , I think i do it step by step, please check once.

if you have problem to set up let me know from https://www.amplethemes.com/contact-us/ here, we will happy to help you

Thank You