Summer Intern - technical advice for debt financing

I will be interning in the debt financing group of a major european bank this summer possibly across Leveraged Finance, High Yield Capital Markets or Loan Capital Markets or just in one. Apparently I will gain exposure to the below products.

Lev Fin: standard leveraged finance. High Yield capital markets; High Yield Bonds; Floating Rate Notes; PIK Notes; Zero Coupon Bonds Loan capital markets: Mezzanine Finance; Second Lien Financing; Senior Debt

I have a pretty good knowledge of M&A valuation but not so hot on debt side. Can anyone offer some advice on what theory i can learn to prepare me for this area, in particular what type of models I should learn, concepts, and what type of thing I might be doing on the day to day. Basically any advice to help me prepare because I want to understand very clearly what I will be doing.

Thanks in advance, much appreciated. J.P.