Is it permissible to memorize the Quran at home by regular recitation without Tajweed rules, due to the inability to leave the house or find a female teacher, while concealing the memorization from family for fear of showing off?

When memorizing, one must observe the correct pronunciation of the words by repeatedly listening to the desired passage recited by a skilled reciter, imitating his manner of pronunciation, and carefully adjusting the letters. One can also use the teaching Mushaf (definition) of Sheikh Mahmoud Khalil Al-Husari. Through this, a degree of mastery can be achieved.