Four weeks is still an exam window, not a band guarantee. A simple split: most weekdays, one timed Task 2 (40 minutes) marked on Task Response, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy. Fix only the lowest criterion the next day. Two or three times a week, sit a timed Reading paper or a short type drill — True/False/Not Given or matching headings — so Reading is not left to week four. Keep Task 1 in the mix once or twice a week (about 20 minutes, 150 words) so the 60-minute paper is not a surprise, but let Task 2 take most of the writing time because it is worth twice Task 1. Practice IELTS covers Writing and Reading only. No Listening, no Speaking, no promised jump.
Take 1 free scored test (Writing or Reading) at https://practice-ielts.com. Then $14.99 for 3 months of Writing + Reading. Not official IELTS.