Yes, there are statements from the scriptures which strongly suggest that Brahma is the personified brahman.
First, who/what is brahman and what is the definition of brahman? This is what the Taittiriya upanishad says on this matter -
Taittiriya upanishad 3.1.3
taṃ hovāca | yato vā imāni bhūtāni jāyante | yena jātāni jīvanti | ...
Deeksha may be or may not be necessary for attaining Brahma Jnana or SELF REALISATION. It depends on the prArabdha of the individual concerned.
1) Ramakrishna "Gadadhar" Chattopadhyay later known as Sri Ramakrishna Paramahamsa had Gurus for initiating him into various methods of worship of the Almighty.
Bhairavi Brahmani initiated Ramakrishna into Tantra,
The Prajāpati of the Vedic scriptures is NOT the mythological Brahmā of the Epic-Puranic literature. This is evident from the explicit statement in Vājasaneyi Saṃhitā (32.5) which states that Prajāpati is the God before whom nothing was born and who pervaded all the worlds.
यस्माज् जातं न पुरा किं चनैव य आबभूव भुवनानि विश्वा ।
प्रजापतिः प्रजया सम्ररा...