In many cases, the praying pose might show similar expressions and postures in both anime and manga. But sometimes, the anime could add more dynamic elements.
A common caricature of a dentist might show them with a magnifying glass to examine teeth, and a bunch of shiny drills and pliers around them. The expression could be either serious and focused or comically panicked depending on the tone you want.
The characteristics of a cartoon-looking alien often include bright, out-of-this-world colors. They might have a friendly or mischievous expression and some kind of special power or gadget. Their design is all about catching the viewer's attention and being fun and memorable.
Honestly, 'cartoon ahwooga love eyes' is quite a strange phrase. It could potentially refer to a unique style of cartoon eyes that convey love, but without more context it's hard to say for sure.
One way is to look up unfamiliar English words in the manga and make notes. Also, try discussing the manga with English speakers to practice speaking. Another option is to write summaries or reviews in English about the manga you read to enhance your writing skills.