一篇语法填空中的两个疑惑

This led him to/into Street Symphony, a group of professional musicians mostly from the LA Philharmonic, which works with homeless mentaaly ill and disabled populations. A member of the Street Symphony said: I gave Palmer some tips on vocal techinque, and/ while he taught me life lessons. I got the better end of the deal.

第一个空是填 to 好还是 into好。

第二个空是and和while都可以填吗，还是只能填一个呢。

1. 从下文看出，Street Symphony 是个“组织团体”（乐队），用 into 表示“加入”，强调动作性。

2. while 用作并列连词，强调两个分句内容的“对比”，从句意看两个都对，但选while 更佳。