Its pretty common for an academic paper to have a first footnote marked with a star or asterisk which contains acknowledgements, a list of places where earlier versions of this paper were presented, and other polite formulas. Neither Duckduckgo or that other search engine shows me how to create one like that, but its actually easy:
Insert -> Footnote and Endnote -> Footnote or Endnote
After that, you can insert footnotes normally, and they will be numbered 1, 2, 3, … or i, ii, iii … as you have it set. The special footnote does not interfere with the numbering of later notes.