A 505 with no preparation is a reasonable starting point. Here's my advice:
First, the instinct to gather every resource you can find is one of the most common ways people slow their own progress. More materials doesn't mean more learning. It usually means scattered effort and no clear path from where you are to where you want to be. What you actually need is the opposite of "all possible resources." You need one comprehensive, structured prep course that takes you through every Quant, Verbal, and Data Insights topic in a logical sequence and tracks your accuracy as you go. That single, well-built path will do more for you than a dozen sources stitched together.
Moving from 505 to the top range, which is 705+ on the current Focus Edition scale, is roughly a 200-point climb. That kind of large jump is very achievable, but it's the product of months of consistent, structured work, not a quick push, so set your timeline expectations accordingly.
Here's the process that produces that kind of improvement. Work one topic at a time. Learn the concepts, formulas, and techniques for a single area thoroughly, then practice only that topic, untimed at first, until your accuracy is consistently high before moving on. For every question you miss, diagnose why: was it a concept gap, a misread, a careless error, or a trap answer? Then redo the question from scratch without looking at the explanation, and revisit it a few days later to confirm it stuck. Only once your accuracy is solid do you add timing, and then start mixing topics into broader sets. Depth first, speed second. Timing problems are almost always a symptom of incomplete content mastery, not a separate skill to drill.
One note on mocks: they're measurement tools, not study tools. You've already used one to establish your baseline, which is exactly what it's for. Save the rest for later in your prep, once you've built real mastery, so they reflect your progress rather than your starting point.
So my recommendation: rather than collecting every resource you can find, commit to one clear, comprehensive, structured course, work through it topic by topic with disciplined error analysis, and give yourself a realistic multi-month runway given the size of the jump. Do that consistently and a major score increase is well within reach.
This article walks through how to build the kind of study plan I'm describing:
How to Make a GMAT Study Plan.
Aish10
I gave my first mock without preparation on official gmat website. need all possible resources to reach 700