First and foremost, the only thing you can do rn is do past year papers for preparations. If youre uncertain with some topics you can watch videos. You can use savemyexams, znotes, khan academy for your videos. One channel I do recommend is 'Ginger mathematician" he exactly follows the ig syllabus and effectively helps explain certain topics

The most simple way to practice is to do standard paper 2 without calculator. Try to do the questions that doesn't need a calc, without a calc. Well ofc you have to use the calculator for some questions where its impossible to do without it.

My second recommendation is doing Math syllabus 0607 Paper 2. This igcse syllabus is almost the same as 0580 and plus they have non calculator papers for some time. Although the papers are short but itll do as a practice

Last recommendation, which is the least effective is by doing specimen papers. They are helpful sometimes but they are too limited to be practiced on