SharePoint Training

Hello,

I currently work as the site administrator for my company. I am self taught at SharePoint and have learned a great deal. I have even taught some introduction to SharePoint classes. I want to get the training I need to gain more knowledge and enhance my skills within SharePoint. I am not someone who knows how to write code, I know a decent amount about workflows and have created various types of workflows using Nintex forms. My biggest question is what type of training do I need? My company is willing to pay for the training, but I do not really know which is the best training option. My end goal is to receive some sort of certification. Does anyone have any ideas on where to begin? Thank you!