Keep up with the latest WordPress version updates.
Be sure you use a strong password, and not the same password you use on other sites.
Scan your site regularly. Do not allow comments to be posted without some oversight. Do not allow guests to post or upload images or files without your knowledge.
I’d like to recommend a plugin called “SEO Data Transporter” that will automatically move your seo data from all in one seo pack over to Yoast.