just want an interactive index for a multible topic lengthy page

I’m looking for some form of interactive index that i can use to place at the top of a page so that i can have the heading of each talking point in the index for one to click on and get directed to that portion of the page
for exsample, say i have 5 paragraphs on one page and each parragraph has a header. i want an index of each header on the top of the page ie

-paragraph one
-paragraph two
-paragraph three
-paragraph four
-paragraph five

when you click on paragraph 4 i want it to scroll down the page to show paragraph four

also i want to be able to add at the end of each paragraph a “top of page button” for eas of navigation on the page.

this is the second day ive been working on the first web site ive ever worked on. I understand somewhat what im looking at when i look at code but im very ignorant to it. so please explain big purple crayon style.

Hope i was clear enough and please forgive the grammar, punctuation,and spelling.