Hello Maria,
Regarding online shopping and in-store shopping,I shouldn't say which one is better because there are just advantages and disadvantages to both.Since you must have had a lot of in-store shopping experiences,I assume it's the online shopping that you are probably not familiar with and look to sourcing solutions.
Comparing to in-store shopping,first of all,online shopping has a lot of convenience features.It saves you time,effort,and money of getting to a pgysical store and the trip of returning.You would have no more waiting-in-line and pushing-through-crowds.Moreover,the searching engines give you good directions to what you are specifically looking for.Also,online payments are safe and easy.
But you should be aware of that online shopping is not worry-free.The quality is of great uncertainties.It wouldn't surprise me that much if the actual product looks a bit cheaper than the one described by a seller,which sometimes can be awefully rediculous.
I hope this helps answer your question.However,my suggestion is this:
You don't have to weigh the pros and cons that carefully.If you have never been shopping online,just go for it.Don't spend money on something expensive while you are online shopping,other than this,it's a lot of fun.