You are brave shooting slide on a Holga-
the top pic does look a little blown in the highlights-
though as with anything Holga,
you can put it in the advantages column if you like-
I prefer the second of these, with the extreme closeup foreground-
looks like a lightleak to complete the picture-
You did well getting images from the Holga on Velvia. The subject matter on the first really suits the cross processing and that’s my favourite of the two.