The article discusses the evolution of wireless communication technologies, focusing on the advancements leading to 6G. It outlines the key features of IMT-2030, which includes three extensions of 5G capabilities (URLLC+, eMBB+, mMTC+) and three new innovations (ubiquitous connectivity, integrated sensing and communications, and AI integration). The paper also highlights three major challenges in 6G implementation: ensuring communication reliability over THz transmission, achieving intertechnology harmony, and ensuring data security in AI-assisted networks. A proof of concept is provided by demonstrating sub-THz signal transmission using Orbital Angular Momentum (OAM) multiplexing, which is a potential candidate for 6G. The article also discusses the standardization efforts and challenges in 6G, including THz spectrum issues, the integration of various technologies, and security and privacy concerns. Additionally, it outlines future research directions and potential innovations in 6G, such as the use of reconfigurable intelligent surfaces and the development of energy-efficient technologies. The paper concludes by identifying research opportunities and future visions based on IMT-2030 recommendations to inspire further potential research.The article discusses the evolution of wireless communication technologies, focusing on the advancements leading to 6G. It outlines the key features of IMT-2030, which includes three extensions of 5G capabilities (URLLC+, eMBB+, mMTC+) and three new innovations (ubiquitous connectivity, integrated sensing and communications, and AI integration). The paper also highlights three major challenges in 6G implementation: ensuring communication reliability over THz transmission, achieving intertechnology harmony, and ensuring data security in AI-assisted networks. A proof of concept is provided by demonstrating sub-THz signal transmission using Orbital Angular Momentum (OAM) multiplexing, which is a potential candidate for 6G. The article also discusses the standardization efforts and challenges in 6G, including THz spectrum issues, the integration of various technologies, and security and privacy concerns. Additionally, it outlines future research directions and potential innovations in 6G, such as the use of reconfigurable intelligent surfaces and the development of energy-efficient technologies. The paper concludes by identifying research opportunities and future visions based on IMT-2030 recommendations to inspire further potential research.