I think she looks like quite the sturdy little mare and I think you could ride her, as long as she's healthy, fit (Good idea about lunging, you can find many videos on youtube about it), hooves are trimmed by farrier, etc.
Let us know how you and Honey do! Please update with pictures, you two look so bonded and happy together!
Intermediate Rider~Learning Equitation and English Pleasure~Interested in Eventing
A horse will tell you everything you need to know about him, if you listen.