If you are looking to start your own study, several reputable platforms offer the text and its famous commentaries (like those of ) for free personal use.
Look for PDFs of these famous commentaries to download alongside the main text:
While the original Arabic text is free to download, modern English translations and verified edits (Tahqiq) often involve years of scholarly effort.
I understand you're looking for a guide on how to find Umdat al-Ahkam (often spelled Umdatul Ahkam ) as a free PDF. This is a famous collection of hadiths on Islamic jurisprudence by Imam al-Maqdisi.