Use Paypal on buying items online

I was just thinking how to use my earnings with Paypal on buying items online। I realized that i will just use my earnings by buying items instead of purchasing a debit card। Will this be a great idea? Though shopping online is convenient but they tend to be more expensive than when you get them on the department store. I am not really knowledgeable when it comes to debit cards and how they work so i was thinking for other things to spend my money online. Besides, i am still single.So i don't have to think of children yet., just family.I usually buy personalized things online which you can't buy from a store. Things like a set of glasses with my name on it, a cup to gift to my friend with her picture on it, etc.I also found some electric goods are cheaper online. To share with you guys my friend advice me not to buy shoes, clothes, etc. online. They may not fit you. Til now, I bought online personalized gifts and I don't have any bad experiences. Specially when i bought to a website which is trust worthy like eBay, amazon, etc.