Thanks for your reply. I seem to be in a state of confusion between J4, T3, and the Socialize template. I've watched several of the T-3 tutorial videos, and they appear to be all J3, so there are things I'm not seeing. I tried to create a copy of the default-content-left layout so I wouldn't edit the default, but I'm not seeing it in any of the directories.
if I use a copy of one-sidebar-right to give me the right side bar do I put my html under the <jdoc:include line? I really don't know what I"m looking at. Should that be removed and replaced with the html.
<!-- MAIN CONTENT -->
<div id="t3-content" class="t3-content col-xs-12 col-sm-8 col-md-9">
<?php if($this->hasMessage()) : ?>
<jdoc:include type="message" />
<?php endif ?>
<jdoc:include type="component" />
<!-- //MAIN CONTENT -->
<!-- SIDEBAR RIGHT -->
<div class="t3-sidebar t3-sidebar-right col-xs-12 col-sm-4 col-md-3 <?php $this->_c($vars['sidebar']) ?>">
<jdoc:include type="modules" name="<?php $this->_p($vars['sidebar']) ?>" style="T3Xhtml" />
< NEW Ad Code here> ?
<!-- //SIDEBAR RIGHT -->