This is the gold standard for out-of-copyright Islamic texts. Search for "Al-Hidayah Vol 2 English Kazi". You will find scanned copies of the 1990s Darul Ishaat editions. These are perfectly legal to download for personal use.
Because of its dense legal reasoning and structured debates, reading Al-Hidayah like a standard textbook can be overwhelming. To get the most out of your English PDF study, consider the following methodology: Al-hidayah Volume 2 English Pdf