Your limited experience - internship as work history - will already allude to the fact that you don't have interview experience. You can address that up front during the recruiting process.
I agree, always be courteous and professional, but you have to interview when given the opportunity. The wooing and interview goes both ways.
More practice means better. And the best practice is real interviewing.
Also don't take the first offer given unless its one of your goal companies.
Keep interviewing for a bit more like https://en.wikipedia.org/wiki/Secretary_problem.
Sorry if my OP wasn't clear, I'm in a real, permanent job. I meant that I was selected for that through my internship performance, the interview itself was very light. I guess your point still stands though.
> Just go for the job you want. Don't burn other companies and waste their time to exercise your experience.
I'd also like to avoid that. Thanks!