In regards to your SEO drop concerns, you may want to check out this link: https://www.rackaid.com/blog/move-webiste-matt-cutts/
The amount of PageRank that dissipates through a 301 is currently identical to the amount of page rank that dissipates through a link. — Cutts
If you leave your domain name and page structure the same, the odds are good that you will not lose much page rank. Of course, Google & SEO are an elusive duo and no one can promise you anything in this arena.
I noticed that in your URL structure you include the month / date as in here: https://www.go4pix.info/2014/05/rihannas-latest-wardrobe-malfunction.html
There is an export from blogger function for WP content, so make sure that your date comes thru in the export. This will save you a bit of headache in the move.
-Renee’