SHOPIFY HTML DESIGN SUB CATEGORIES FOR ALL CATEGORIES I CREATE IN FUTURE 2-3 deep SUB CATEGORIES

Hello, I recently started a shopify store and have spoken to multiple shopify "gurus"   and I am having an issue with site navigation.  it is not an issue on other platform I use.  cant believe shopify doesn't have this functionality (crazy) and they told me to contact you. I just started my site,  but I need some logical navigation for main and sub categories as example , if you look at CLOCKS   link  on home page  and  pull down menu "For the Home" now clocks have many  categories ,   ex,  cuckoo clocks , wall clocks, desk clocks, novelty clocks, etc... etc... so when you click on clocks image/link it should take you to the sub categories page of all clocks then  if you click on CUCKOO CLOCKS  ,  guess what  their are subcategories of that too then you should see sub categories of these  on next page ex.  1 day cuckoo clocks, 8 day cuckoo clocks,  Quartz Cuckoo Clocks,  Chalet Cuckoo Clocks , Musical Cuckoo Clocks,    etc..  etc...    and then           click and see the items  an in some cases  you may have a couple more categories  then to products logical navigation for customer.    otherwise its a bird nest of endless clock item pages.  crazy and the same goes for other category items  globes, beer steins   ,  and all the rest items I will be adding hope this clarifies this please advise asap thanks ralph merchant