Hi,
You can type in Hindi in Acrobat.
Two things you need to have. First is Adobe acrobat professional or DC. You can download for free or trial. Second is hindi font, click on this link
http://www.easynepalityping.com/resource/font/devnagari_new.zip or copy paste it in ur browser. It will download a zip. copy paste the contents in ur C/ windows/ fonts folder.
In acrobat, go to tools and then select add text. make the text box. then go to content editing panel on side. select the font devnagari new. You can type in hindi now.
You can use this site, if you dont know how to type in hindi.
http://www.easyhindityping.com/ it will convert whatever you type in english to hindi. see the text example.
Hope this helps.