Software for creating image

I've been code for android/ios using flutter more than a year. Now I would like to learn new things by using software to create image instead of just getting icons from google material design (just like image below).

Any recommended ? Thanks.

Inspirational Websites Roundup: Webflow Special #5
In Articles, Inspiration, roundup
In collaboration with Webflow, we’re thrilled to present this roundup, featuring a handpicked selection of awe-inspiring websites. […]
Building Scalable Software Solutions for Display Manufacturing Automation
No categories
As display manufacturing continues to evolve, the demand for scalable software solutions to support automation has become more critical than ever. Scalable software architectures are the backbone of efficient and flexible production lines, enabling man... […]
Collective #850
No categories
Menu-Design Checklist * STL Twister * DGM.js * ASCII Silhouettify […]
How To Use Thread.sleep() in Selenium
No categories
When performing Selenium automation testing, you might encounter a NoSuchElementException() when the element you're trying to interact with isn't found. This error typically occurs due to the element existing on the page but takes a considerable amount... […]
Leveraging Test Containers With Docker for Efficient Unit Testing
No categories
In the changing world of software development, testing is crucial for making sure that applications are reliable, functional, and perform well. Unit testing is a method used to check how parts or units of code behave. However, testing can get tricky wh... […]