If you use ReportGarden app for the first time, you'll see the homepage.

Click on 'Proposals' icon.

You should have at least one client to create a proposal. So, once you click on the proposals icon, you'll see 'New Client' creation page. 

After creating a client, you'll see the 'Proposals welcome page.' Click on 'Create Proposal' button.

Choose a template.

Give a name to your proposal and submit. That's it.😃