.htaccess help

https://recoveryfarmhouse.com Once I started trying to speed up my website I made ever mistake in the world. I installed wp super cache and barely got the site back. I tried optimization in godaddy which I guess is apache mod deflate. I am not sure if it transformed my .htaccess file or made a new one. Can someone please interpret this for me and give me directions on what I should do? I do have an image plugin optimizer “short pixel” installed but I think there is a time limit on its functions and then you must buy it. This is what my file looks like .htaccess
<IfModule mod_deflate.c>
SetOutputFilter DEFLATE
<IfModule mod_setenvif.c>
# Netscape 4.x has some problems…
BrowserMatch ^Mozilla/4 gzip-only-text/html

# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip

# MSIE masquerades as Netscape, but it is fine
# BrowserMatch \bMSIE !no-gzip !gzip-only-text/html

# NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48
# the above regex won’t work. You can use the following
# workaround to get the desired effect:
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

# Don’t compress images
SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
</IfModule>

<IfModule mod_headers.c>
# Make sure proxies don’t deliver the wrong content
Header append Vary User-Agent env=!dont-vary
</IfModule>
</IfModule>

My website is slow but seems to be functioning properly as of now. Thank you guys so much for all of the help you have given me the past 2 years.