Can Not Publish My Content

I have just made a WP site and set it up with a theme. I have installed the needed plugins and made my first post and was able to preview my site successfully! But after I go to my site just typing in my URL, my site looks like it just had a theme installed without the bells and whistles? I tried what I could and cannot get my site to look how I want it to look? After I’m done posting on my WP site and everything and previewing it, it’s perfect and when I go to it, it looks undeveloped? Thank you guys for your help in assisting me in this matter!