I don't want to do anything online. I just want to live life like before 1900.
How could you live a life without computers?
Not sharing your information is a good step and when you do compartmentalize it. Different emails and phone numbers for different things. I have a few google numbers I give out besides my actual number. Lots of my information on online fourms is completely made up but documented. I use keepass to keep strong passwords and notes on accounts. If it doesn't need my real name, it doesn't get it. Limiting information on the web about you is good over all.
Shopping in store doesn't give you security unless you use cash. The Target Breach was all in store and they actually said that "There are no indications at this time that the breach affected customers who shopped at Target’s online stores." Home Depot was malicious software installed on the self-checkout lanes.
As for living life like its 1900, you can as long as your job is not in computers or using one. Grabbing cash from the bank, paying for cash in store. No online bill pay or banking, no hacker news. I have known a lot of guys that do it daily. Even have dumb phones that were super cheap.