You want to read books like Kamen’s The Spanish Inquisition, and other proper histories. Generally torture was confined to serious cases and non-bloody methods - the main one being Strappando, where a person was hoisted off the ground by his arms tied behind his back.
Much about the inquisition has been massively exaggerated by propagandists over four centuries.
The Crusades by Thomas Madden says “Modern research suggests that the Inquisition’s popular reputation for harshness derives largely from Protestant (specifically Dutch and English) propaganda, In fact the Inquisition, which still exists, was probably the most humane and merciful tribumal in medieval Europe.”
Here is a passage on the medieval inquisition from notable Historian Christopher Tyerman’s book “God’s War, a History of the Crusades.”
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"…the inquisition did not become the sinister bureaucratic institution of repression of legend. … The object of each Inquisition was, as its name suggested, to discover who were heretics and to eradicate disbelief by persuasion and reconciliation. Although the accused were prevented from knowing the identities of witnesses, they were permitted to mount a defence. Torture was rare and unsophisticated. Reason, not terror, was the inquisitors weapon. A university was founded at Toulouse in 1229 to underpin the ideological basis of the Catholic mission. The combination of new pastoral methods; effective, professional preaching; the dissemination of systematic moral theology of the schools; and the simplicity and directness of the friars who largely conducted the Inquisition combated Catharism at every level, intelectual, parochial and personal. The punishments reflected the purpose of evangelism. The vast majority of those found guilty of heresy received non-custodial penances. Contumacious or obstinate offenders could expect prison. Only a tiny minority of convicted heretics were handed to the secular authorities to be burned at the stake. One calculation from hundreds of penalties imposed in mid-thirteenth century Languedoc estimated that death sentences made up 1%, imprisonment 10 - 11%; the rest lesser penalties, including the compulsory wearing of a cross to denote a former heretic.