Fix links

Author: mahaloz

docs/quickstart/install.md

@@ -56,5 +56,5 @@ your SSH key when BinSync is in use.
 After you are done installing BinSync with the steps above, it is reccommended that you validate the install works by syncing data from our example binsync project.
 You can find a tutorial to validate this install, with some basic usage, in the [Joining a BinSync project](./joining-project) section.
 
-After validating your installation, it's **highly** recommended that you read the [Usage Guide](/docs/fundamentals), since BinSync can be rather complicated to
+After validating your installation, it's **highly** recommended that you read the [Usage Guide](/ui-guide), since BinSync can be rather complicated to
 use on your very first look at it. 

docs/ui-guide.md

@@ -7,7 +7,8 @@ sidebar_position: 3
 It's a good idea to start here before going to any other use-page so you understand all the features BinSync has to offer and how to access them.
 
 ## The Core Basics
-BinSync works on Git, which means that everything is version-controlled, and nothing is automatically changed in your local client. If you followed the [Install Validation](/docs/install-validation) page, then you should already understand that you request specific users content. 
+BinSync works on Git, which means that everything is version-controlled, and nothing is automatically changed in your local client. 
+If you followed the [Joining a Project](/quickstart/joining-project) page, then you should already understand that you request specific users content. 
 
 ### Syncing: No Pulling, No Pushing
 You may be thinking that when you click `Sync`, it's like you are pulling, but that is not really the case. Under the hood we have a thread going that is doing real `pulling` and `pushing` on the Git level to update your Git's knowledge of users. This makes more sense if you look at how users are stored in the BinSync database.